Features: Bimetallic Material Nozzles: Made of copper alloy and hardened steel. The thermal conductivity of copper alloy is as high as 330W/m k, ensuring that the nozzle is heated more evenly. The volume is enlarged, supporting a high-speed printing speed of 600mm/s. High Heat-resistant: Copper alloy is heat-resistant up to 500°C, while hardened steel is heat-resistant up to 450°C. They can be used with various filaments for printing. Applicable to PLA, ABS, PETG, TPU, PP, PC, PL A-CF, PA-CF, PET-CF, etc. Exquisite Details: Nickel plating on the nozzle surface greatly reduces the adhesion of filaments to the nozzle, resulting in smoother feeding. What You Get: 2*0.4mm nozzles, 1pc 0.6mm nozzle and 1pc 0.8mm nozzle. Specification: Compatible models: K1K1Max Applicable filaments: PL A, ABS, PETG, TPU, PP, PC, PL A-CF, PA-CF, PET-CF, etc. Nozzle diameter: 0.4mm 0.6mm 0.8mm Material: copper alloy, hardened steel Package Size: 55×55×40mm/2.1x2.1x1.5in Package Weight: 31g/1oz Packing List: 2 x 0.4mm nozzle 1 x 0.6mm nozzle 1 x 0.8mm nozzle