Used Dil Engineering Gmbh Fiberflow F50 for sale (78,962)

Condition: good (used), functionality: fully functional, Year of construction: 2024, The bunker conveyor from Lange Fördersysteme is for sale; it was previously used by a manufacturer of medical technology equipment. Conveyor belt length: 2100 mm Discharge height, side: 1600 mm Usable width: 190 mm Cleats: 20 mm high, spaced 130 mm apart Container size: L: 1500 mm, W: 580 mm Ndsdpezyr Nbsfx Akmec Spindle for discharging the bulk material Mounted on adjustable feet Base frame: L: 1800 mm x W: 1000 mm

Condition: new, functionality: fully functional, Year of construction: 2026, control type: CNC control, degree of automation: manual, actuation type: electric, laser type: fiber laser, laser source manufacturer: Max Photonics, laser power: 1,500 W, laser wavelength: 1,063 nm, sheet thickness (max.): 10 mm, sheet thickness steel (max.): 10 mm, sheet thickness stainless steel (max.): 6 mm, sheet thickness aluminum (max.): 6 mm, sheet thickness brass (max.): 4 mm, sheet thickness copper (max.): 1 mm, table length: 600 mm, table width: 600 mm, travel distance X-axis: 600 mm, travel distance Y-axis: 600 mm, travel distance Z-axis: 100 mm, feed rate X-axis: 60 m/min, feed rate Y-axis: 60 m/min, feed rate Z-axis: 100 m/min, cutting speed: 60 mm/min, positioning speed: 60 m/min, positioning accuracy: 0.02 mm, repeat accuracy: 0.05 mm, workpiece weight (max.): 50 kg, power: 1.5 kW (2.04 HP), input voltage: 400 V, input current: 30 A, input frequency: 50 Hz, overall weight: 1,000 kg, total length: 1,630 mm, total width: 1,450 mm, total height: 1,850 mm, warranty duration: 12 months, Equipment: cooling unit, documentation/manual, emergency stop, Extremely precise and fast machine. The software is easy to learn. Output power from 1 to 3 kW is available for this machine. Ndodpfjzzkrwjx Akmoc This laser cutting machine is extremely robust and requires minimal maintenance. Ideal for cutting all types of metals. The recessed marble bed prevents warping due to heat. Applications: medical technology, toolmaking, precision components.

Condition: as good as new (ex-display), Gravity roller conveyor for pallets and metal boxes (3-lane),4.26 m, Brand new condition (without warranty) Manufacturer / System: ELD Raktártechnika Type: Gravity roller conveyor / gravity lane 3 item in stock Transportable unit: Pallet, metal box, storage container, and other custom loads Length: 4264 mm (Sections: A2 L=1768 mm + C L=2496 mm) Installation width (EL): 850 mm Usable width (CW): 810 – 812 mm Overall width: 930 mm Roller pitch: 78 mm Nodjzr Hv Topfx Akmedc Conveyor slope: 4% Load capacity (per unit): Minimum 120 kg when using brake rollers Maximum 720 kg (Max. weight ratio 1:4) Finish / Material: Galvanized and painted steel frame (Grey RAL 7005 / Yellow RAL 1021) Features: - Integrated brake rollers (with speed control against load acceleration) - 2 stop elements - Manually released intermediate stop (with yellow operating lever) - Entry guide plates (yellow) and side guide rollers - End stop Operating temperature: 0 – 45 °C (dry warehouse environment)

Condition: used, Year of construction: 1991, 2 vertical stainless steel tanks with dished bottoms, shell cooling zone, manhole, sampling tap, insulation and central outlet. Additional title: 2 insulated, coolable tanks Volume: 44361 l Nodpfx Ajztya Uokmjdc Operating pressure: 0,9 bar Operating temperature: 20 °C Material: stainless steel Position: vertical Base construction: cylindrical tank with dished bottoms, placed an 4 square tube feet Features: insulated, covered, 1 cooling zone (183 l, 0.9 bar), manhole, safety valve, CIP pipe with spray head, manometer, yeast plug Periphery: own temperature control

Condition: used, Year of construction: 1986, A vertical stainless steel tank with multiple cooling zones and various fittings. Most recently used as a fermentation tank for beer. Additional title: Coolable tank Capacity approx.: 11600 l Width: approx. 2,3 m Height: approx. 4,1 m Material: Stainless steel Position: vertical Nedpfx Akszty E Rsmjdc Base construction: on 4 feets Features: manhole; cooling jackets; spunging apparatus; sampling valve

Year of construction: 1990, condition: used, Capacity: 250 hl/h Pressure: 16 bar Length: 3.000 mm Width: 750 mm Height: 2.246 mm Weight: 3150 kg Nodezty Hnepfx Akmsdc Material: plates: 1.4404/0,8mm 196 WAP, 59 HHP, 3 AP / seals: Perbunan PRESS IN Base construction: clamping screw cap NIRO pedestal Features: 4-stages (heater, hot holding section, regenerative heat exchanger, pressure reduction), connections: DN65

Condition: ready for operation (used), Year of construction: 2000, There are 13 LTA Type IR dust extraction systems available. They are from various production years (1997-2001), but are all the same type. The systems will be dismantled in week 35 and will then be available for delivery. The ionizer and collector will be cleaned in an ultrasonic bath, and the housing will be wiped down. More systems will become available in the coming months. Ndedpfx Akjzv Ttajmjc 20 x LTA AC3001 R, production years 2004-2011.

Condition: excellent (used), Year of construction: 1995, functionality: fully functional, machine/vehicle number: 94681, travel distance X-axis: 700 mm, travel distance Y-axis: 900 mm, travel distance Z-axis: 500 mm, overall weight: 3,000 kg, ZEISS PRISMO 5 3D coordinate measuring machine with VAST probing system For sale is a used ZEISS PRISMO 5 3D coordinate measuring machine, serial number 94681. The machine is equipped with a ZEISS-VAST probing system and a comprehensive multi-probe changer. A machine-side ZEISS control console is also included. Additionally available is a cabinet with probes, which is not included in the stated machine price and can be offered separately if desired. Details regarding the content and scope of the probe inventory can be provided upon request. Machine data Manufacturer: ZEISS Model: PRISMO 5 Serial number: 94681 Probing system: ZEISS VAST Equipment: Multi-probe changer Condition: used ZEISS service and inspection marking The machine has a marking from the technical service department of Carl Zeiss IQS Deutschland GmbH, referring to an inspection according to DIN EN ISO 10360. Documented specifications: MPE(E0): 2.70 + L/250 P: 2.00 RONt: 4.40 Type: PRISMO 5 Serial number: 94681 Calibration date: 02/2025 The values stated are reproduced according to the ZEISS marking on the machine. ZEISS CALYPSO 5.8 is visible on the existing control PC. The exact scope of the license or the transferability of an existing software license is not part of this information and can be checked separately if desired. Optionally available In addition, there is the possibility of purchasing a separate cabinet with a comprehensive inventory of ZEISS probes and accessories. This cabinet is not included in the machine price and can be offered separately if desired. Condition and inspection The machine is in used condition. An inspection is possible after prior arrangement. The exact scope of delivery can be agreed upon or checked based on the available components if there is concrete interest. Errors, changes and prior sale are subject to change. HOLZHÄUER Hydraulik & Maschinenbau GmbH Ndjdpfxszwvk Rj Akmjc

Year of construction: 2020, condition: used, functionality: fully functional, machine/vehicle number: 07.019.0000.00 / 114247 / 006, The mobile nozzle pack installation device from Theilen Maschinenbau is designed for lifting and positioning nozzle packs during assembly work. The welded frame structure is mounted on four swivel castors and features side handles for manual movement. The upper working beam is raised by a centrally mounted hydraulic hand jack and guided by two vertical guide elements. The beam is fitted with adjustable supports and mounting pins. The maximum load capacity is 200 kg. The device was manufactured in 2020 and bears CE marking. Safety symbols indicate a hot surface, an overhead hazard and the required use of head, hand and eye protection. Manufacturer: Theilen Maschinenbau GmbH Type: Nozzle pack installation device Number: 07.019.0000.00 / 114247 / 006 Year of manufacture: 2020 Maximum load capacity: 200 kg Lifting mechanism: Hydraulic hand jack Construction: Welded frame structure Nodpjzw T Dusfx Akmsdc Undercarriage: 4 swivel castors Beam guidance: 2 vertical guide elements Conformity marking: CE

Year of construction: 2020, condition: used, functionality: fully functional, machine/vehicle number: 376292, The Reitz KXE 250-050030-00 is an industrial centrifugal fan designed to generate a high total pressure increase in process installations. The assembly consists of a volute fan casing, an impeller mounted on a separately supported shaft, a coupled electric motor, and a common steel base frame with vibration-isolating mounts. The KXE design is suitable for moving air and process gases in systems requiring high flow rates and pressure. This unit was manufactured in 2020 for a rated volume flow of 500 m³/min and a total pressure increase of 2500 daPa. At its operating point, it delivers 602.4 m³/min at 1862 daPa and 3033 rpm. The shaft is supported by two 6318 bearings lubricated with Shell Gadus S2 V100 2 grease. Manufacturer: Konrad Reitz Ventilatoren GmbH & Co. KG Type: KXE 250-050030-00 Product type: industrial centrifugal fan Serial number: 376292 Year of manufacture: 2020 Material number: 10466442 Measurement category: C Efficiency grade: N61 Target efficiency grade value: 64.5 Rated inlet temperature: 20°C Operating-point inlet temperature: 40°C Rated inlet medium density: 1.205 kg/m³ Operating-point inlet medium density: 0.93 kg/m³ Rated volume flow: 500 m³/min Operating-point volume flow: 602.4 m³/min Rated total-pressure increase: 2500 daPa Operating-point total-pressure increase: 1862 daPa Optimum efficiency: 76.3% Rated shaft power: 256.57 kW Operating-point shaft power: 231.1 kW Rated rotational speed: 2980 rpm Operating-point rotational speed: 3033 rpm Maximum rotational speed: 3159 rpm Maximum medium temperature: 80°C Drive-end bearing: 6318 Non-drive-end bearing: 6318 Lubricant: Shell Gadus S2 V100 2 Initial relubrication interval: 2460 operating hours Ndedpozw Ucxsfx Akmoc Subsequent relubrication interval: every 2460 operating hours Grease quantity per bearing: 132 g Conformity marking: CE

Year of construction: 2020, condition: used, functionality: fully functional, machine/vehicle number: 376295, The Reitz KXE 250-050030-00 is an industrial centrifugal fan designed to generate a high total pressure increase in process installations. The assembly consists of a volute fan casing, an impeller mounted on a separately supported shaft, a coupled electric motor, and a common steel base frame with vibration-isolating mounts. The KXE design is suitable for moving air and process gases in systems requiring high flow rates and pressure. This unit was manufactured in 2020 for a rated volume flow of 500 m³/min and a total pressure increase of 2500 daPa. At its operating point, it delivers 602.4 m³/min at 1862 daPa and 3033 rpm. The shaft is supported by two 6318 bearings lubricated with Shell Gadus S2 V100 2 grease. Manufacturer: Konrad Reitz Ventilatoren GmbH & Co. KG Type: KXE 250-050030-00 Product type: industrial centrifugal fan Serial number: 376295 Year of manufacture: 2020 Material number: 10466442 Measurement category: C Efficiency grade: N61 Target efficiency grade value: 64.5 Ndsdpfx Aozw Ug Rekmjc Rated inlet temperature: 20°C Operating-point inlet temperature: 40°C Rated inlet medium density: 1.205 kg/m³ Operating-point inlet medium density: 0.93 kg/m³ Rated volume flow: 500 m³/min Operating-point volume flow: 602.4 m³/min Rated total pressure increase: 2500 daPa Operating-point total pressure increase: 1862 daPa Optimum efficiency: 76.3% Rated shaft power: 256.57 kW Operating-point shaft power: 231.1 kW Rated rotational speed: 2980 rpm Operating-point rotational speed: 3033 rpm Maximum rotational speed: 3159 rpm Maximum medium temperature: 80°C Drive-end bearing: 6318 Non-drive-end bearing: 6318 Lubricant: Shell Gadus S2 V100 2 Initial relubrication interval: 2460 operating hours Subsequent relubrication interval: every 2460 operating hours Grease quantity per bearing: 132 g Conformity marking: CE

Condition: used, functionality: fully functional, The IBD Wickeltechnik industrial unwinding-shaft assembly is designed to support and controllably unwind rolls of web material. It incorporates an unwinding shaft supported by KL.S-series foot-mounted safety chucks, a CX.250.4 single-disc pneumatic brake, and forced cooling from a 24 V DC fan. The safety chucks allow for rapid shaft loading and removal, while the locked closure secures the journal during operation. The brake uses four pneumatic calipers, a 250 mm self-ventilating cast-iron disc, and a modular design that enables control of the braking torque through air pressure. The assembly is mounted on an adjustable, wheeled steel transport frame. Manufacturer: IBD Wickeltechnik GmbH Device type: industrial unwinding-shaft assembly with pneumatic brake Safety chuck model: IBD-KL.S.O.1800.0380.1.40.VT Ndodpfxezw Uile Akmjc Safety chuck series: KL.S Safety chuck configuration: foot-mounted Maximum shaft and roll weight: 1800 kg Maximum safety chuck torque: 380 Nm Square journal range: 30–40 mm Triangular journal size: 36 mm Brake model: CX.250.04.28.0/V.24 Brake type: pneumatic, single-disc, air-cooled Number of brake calipers: 4 Brake disc diameter: 250 mm Disc material: cast iron Minimum braking torque: 6 Nm at 0.2 bar Maximum braking torque: 640 Nm at 6 bar Maximum permissible brake speed: 2500 rpm Fan voltage: 24 V DC Safety chuck serial number: 6800.37879.1/47.18 Brake serial number: 6800.37879.12/47.18

Year of construction: 2022, condition: like new (used), functionality: fully functional, We are presenting the almost brand-new EyeC GmbH EyeC Proofiler 1200 DT (EyeC 3023) Print Inspection & Quality Control System. HIGH CONVERSION DESCRIPTION Like New - Immediate Availability - Priced to Sell - Ready for Export Model: EyeC Proofiler 1200 DT Condition: Like New - barely used EyeC Proofiler 1200DT print inspection system in excellent condition, barely used and fully operational. This is a great opportunity to acquire a high-end inspection system at a significantly lower price. ✔ Print-to-Print & Print-to-File Comparison ✔ High-precision defect detection ✔ Suitable for pharmaceutical, packaging, and commercial printing The machine is installed and can be tested. Additional photos and videos are available upon request. 🌍 Available for export 📍 Located in Turkey ✈️ Delivery Terms: EXW Turkey – ready for export ⚠️ Serious buyers only - quick decision preferred Nsdeyxfrpspfx Akmsdc 📧 Contact now for price discussion and details ▪️ Inspection Type: Print-to-print & Print-to-file comparison ▪️ Application: Print Inspection & quality control ▪️ Max. inspection width: approx. 1200 mm ▪️ Camera system: High-resolution line scan camera ▪️ Lighting: Integrated LED illumination system ▪️ Defect detection: Missing print, color deviation, misalignment, defects ▪️ Software: EyeC Proofiler Software (original) ▪️ Operation: PC-Controlled System ▪️ Speed: High-speed automated inspection ▪️ Industry: Pharmaceutical, packaging, commercial printing The machine is installed and can be demonstrated upon request. If you have any questions or need further information, you can send us a message or call us. You can also reach us via email or WhatsApp.

Condition: used, Ex-protected filter unit, extraction system, central extraction cartridge - impulse filter P. RIES GmbH Type 330 D ATEX Cartridge filter system, rectangular filter unit, central welding fume extraction Machine no. 10011932 Year of manufacture: 2020 - as new, unused Airflow rate: 3,300 m³/h Airflow rate: 0.9 m³/sec Filter area: 20 m² (1 piece cartridge filter) Differential pressure: 3,300 Pa (33 mbar) Extraction connection at filter inlet: 2x Ø 150 mm Exhaust connection at filter outlet: sound insulation hood Compressed air connection: approx. 8 bar Motor power: 3 kW Mains connection: 400 Volt, 50 Hz - Explosion-protected design ATEX II 2Db 125°C / 3G T4 - Pneumatic rotating filter cleaning, manual via push button - Manometer for differential pressure display (vacuum display in mbar) - Service door for filter replacement - Filter stage 1 = 1 cartridge filter Ø 325 mm, length 900 mm P-RIES, type cartridge filter 20.1 m², BGIA/IFA class M, antistatic - Filter stage 2 = filter outlet (sound insulation hood) equipped with 9 activated carbon filter cartridges, type AKZ 2500V, 266 m³/h per filter cartridge - Built-in radial fan, type IE 3-premium efficiency, 12% improved efficiency - Robust steel construction in RAL 7035 light grey, antistatic powder-coated - Dirt collection container as pull-out drawer approx. 70 litres (440 x 530 x 300 mm) - EC Declaration of Conformity, operating instructions with wiring diagram available Ndsdpfx Akoy N Duqemoc Required space (L x W x H): 670 x 700 x 2430 mm Weight extraction unit: 211 kg Transport dimensions on pallet (L x W x H): 930 x 1350 x 1950 mm Weight incl. transport pallet: 236 kg As new, unused, ex stock

Condition: ready for operation (used), functionality: fully functional, Year of construction: 2018, input frequency: 50 Hz, input voltage: 400 V, empty load weight: 50 kg, Tool tempering heating: 9 kW. Temperature: 150°C. Ndsdszab A Espfx Akmoc

Year of construction: 1998, operating hours: 6,000 h, condition: excellent (used), functionality: fully functional, Complete Technological Line for tomato paste production - 3-stage vacuum evaporators Professional industrial plant for the concentration of tomato juice and fruit juices. Manufactured by the experienced Bulgarian manufacturer Thermohran Engineering, this system is designed for high-quality production, preserving the organoleptic characteristics of the product through low-temperature vacuum evaporation. Technical Specifications: Manufacturer: Thermohran Engineering Ltd. (Bulgaria) Year of Construction: 1998 Material: High-grade Stainless Steel (Inox) System Type: 3-stage Vacuum Evaporator Components Included: * Main Evaporation Columns Ndodpfx Akozfx Dvsmec II.5. GENERAL LAYOUT DATA OF THE COMPLETE LINE Capacity (processed tomatoes) t/24h 150 Product capacity 28-30 oBrix kg/h 1 000 Steam consumption kg/h 4 000 Tap water consumption m3/h 10 Sealing water consumption m3/h 0.7 Electrical consumption kW/h 147 Water consumption t = 18 oC m3/h 78 t = 28 oC m3/h 195 Air consumption at P= 4 bar nm3/h 7 Mounting area m 6x40x6m (in the area of the evaporating installation the height must be 13 m) Complete Control Panel (Brix meter) Pumping Station (centrifugal pumps) External Cooling Tower / Heat Exchanger unit Applications: Enrichment of tomato juice (Double and Triple Concentrate). Fruit juice concentration.

Condition: as good as new (ex-display), Year of construction: 2025, operating hours: 1 h, functionality: fully functional, Overband magnet Type: UB 600 Magnetic field strength: 2,500 Gauss Working width: 600 mm Nedpfx Akoxy Hl Dsmodc Operating voltage: 3x400 V Frequency: 50 Hz Rated operating current: 5 A Operating speed: 30 - 90 rpm Maximum sound pressure level: 50 dB Machine weight: 750 kg Price excludes stand Location: Austria Available immediately

Condition: used, Year of construction: 2004, Overview The Solo Screw Capper was manufactured in 2004 by the German engineering company Dr. Datz. The machine can process aluminum screw caps. It was used in a bottling line of a mineral water company. The line mainly used for contract bottling and was now stopped, to be sold in parts. Technical Specifications: Njdpfxsxrfzho Akmjdc - Number of closing elements: 8 - Capacity: up to 20.000 bph - Cap type: 28mm aluminum screw cap - Working direction from left to right - Format: 0,7l GDB bottle

Condition: excellent (used), Year of construction: 2019, functionality: fully functional, Technical specifications: Operating voltage: 400V AC, 3PH/PE Frequency: 50Hz Ndjdpfx Akexzuc Hemjc Connected load: 110kVA Main supply fuse: 200A Production capacity: depending on material to be processed, 20m/min / 6" core up to max. 830mm diameter / up to 1.4t Degree of automation: fully automatic Installation dimensions: 5.2x3.7x3.2m (LxWxH)

Condition: excellent (used), Year of construction: 2019, functionality: fully functional, Precision winding machine for films and web materials. Designed for consistent unwinding, guiding, and rewinding of roll materials. Integrated safety system with protective glazing, laser start position indicator (green), emergency stop switches, and pneumatic film guiding. Machine frame made of steel, electrically controlled drive. Ideal for production lines in coating or laminating technology. Ndedpfx Akexzuiysmoc

Condition: not inspected (used), Year of construction: 1995, gabletop filling machine for milk 1000 packs/h 0,25 L / 0,5 L / 1,0 L Ndsdpfxjhx D E De Akmsc for cartons without screwcap

Condition: good (used), Manufacturer: Rhein-Nadel Automatisation GmbH Ndodpfx Akjgth U Ismec Type: SRC-N 630-1 R Vibration frequency: 50 Hz/3000 min -1 Electrical power: 220 V Drum diameter: 900mm Adjustable vibration

Condition: new, Year of construction: 2024, functionality: fully functional, Technical description with the following key data: Load capacity: 1000 kg static line load Useful stroke: 775 mm Overall height: 85 mm Total height: 860 mm Platform length: 1450 mm Platform width: 1140 mm Material: Smooth sheet metal Lifting time: approx. 20 sec. for the full useful stroke Lowering time: load-dependent Electrical connection: 3 x 400 V / 50 Hz + protective earth, with 16 A CEE plug and 4-meter cable Motor: 1.1 kW Paint finish: Blue-grey RAL 7031 Unit placement: freestanding Control box: Dead man’s control incl. 2 m cable Total weight: approx. 270 kg Standard version: Nodpfxoiwi Ine Akmodc The lifting tables comply with EN 1570 E and are marked with the CE symbol. The steel parts are cleaned, primed with rust-protective paint, and painted with a two-component polyurethane paint. The lifting tables are equipped as standard with all-round safety cut-off strips made of aluminum and with mounting supports for repair and servicing. Our lifting tables are designed for approximately 5 lifting cycles per hour with full load in 8 hours per day. For more intensive operation, we offer special lifting tables.

Condition: new, Year of construction: 2025, Parker-Airtech presents the latest generation of nitrogen generators, which impress with an outstanding air factor on the market. Our systems are characterized by the exclusive use of high-quality components, which ensures their longevity and reliability. The cost-effective operation of the system is characterized by low power consumption with maximum output, low-maintenance operation of the system, no additional gases such as hydrogen to reduce oxygen and high-quality and durable components. This means that the system can be amortized in the shortest possible time. Ndjdpenq Dkijfx Akmec An intelligent monitoring system enables continuous monitoring of the operating parameters and ensures that you are always informed about the status of your system. Whether in the office or on the go - our system can also be conveniently viewed on your mobile phone, so that you always have control over your nitrogen production. The system is individually tailored to your needs. Parker-Airtech has made it its mission to offer you the best technologies to optimally support and maximize your processes. Trust in innovation, quality and performance - choose Parker-Airtech.

Condition: new, functionality: fully functional, rope length: 30,000 mm, rope speed: 47,000 mm/min, machine/vehicle number: HAW1700-EV-Funk, Hydraulic winch for wood splitters, cranes, mini excavators, tractors, agricultural vehicles, viticulture, horticulture, and many other applications. The hydraulic attachment winch simplifies many tasks: - Pulling and positioning firewood to the wood splitter - Pulling logs onto trailers - Removing tree stumps and roots - As an attachment winch on forestry cranes and small excavators - As a winch for small tractors and narrow-gauge tractors A robust steel construction with 3-sided mounting options (left, right, rear) and 12 threaded holes offers many possibilities for attaching the winch (threads are cut and painted. They need to be re-cut with a thread tap before use due to the rust protection). A 20 m long and 6 mm thick steel cable is mounted. A large cable pulley ensures a long service life for the steel cable. We mount hydraulic motors from 50 to 630 cc (standard = 400 cc), depending on the speed and pulling force required. Maximum working pressure: 225 bar peak Continuous operating pressure: 175 bar Displacement: 400 cc Torque at 225 bar: 870 Nm peak Torque in continuous operation: 380 Nm Maximum pulling force: 1700 kg Weight: 49 kg Cable speed: 47 m/min at 60 L/min hydraulic oil Color: red Dimensions: Ndodpfxsdf Ufpe Akmsc Length: 500 mm Length with swivel: 570 mm Front width: 120 mm Rear width: 180 mm Bearing width: + 30 mm Motor width: + 200 mm Height: 250 mm The winch is available for mounting or welding. This version includes an electric hydraulic valve, remote control, and hoses to the motor. Article number: HAW1700-EV-Funk