K1 Nozzle Kit for K1, K1 Max, CR-M4, CR-10 SE, Ender 3 V3 KE 3D Printer Copper Alloy Material with High Thermal Conductivity Fast Heating: Higher thermal conductivity ensures uniform heating of the nozzle and smoother extrusion.Improve the structural strength of layer-to-layer adhesion, which greatly levels up the printing quality. also copper alloy nozzles can resist high temperatures up to 500°C and high-speed printing capability of up to 600mm/s, hardened tool steel, Hardened steel is heat resistant up to 450°C,good abrasion resistance, heat resistance and corrosion resistance, sturdy construction makes them durable to serve you for long time, suitable for 3D printing at high temperature They can be used with various filaments for printing, such as PLA, ABS, PETG, TPU, PP, PC, PLA-CF, PA-CF, PET-CF Package: 4PCS Hardened Steel + 4PCS copper alloy nozzle + 4PCS Brass High-Temperature nozzles, this kit contains total 12 PCS 0.4 mm nozzles in three materials. Please note:Slight color difference or difference in kind, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:Chromium Zirconium Copper + Brass + Hardened Steel Package Contents: 4 x Hardened Steel Nozzle 4 x Copper Alloy Nozzle 4 x Brass 0.4mm Nozzles Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.