Compatible with: These nozzles and silicone socks kit are compatible for Creality K1, K1 Max, Ender 3 V3 KE, CR-M4, CR-10 SE 3d printers, please confirm your 3d printer model before ordering Super Durable Brass Material: These nozzles are made of high-quality hardened steel, with a longer life use time than the brass nozzle. Not easily clogged during printing, easy to clean. Made with centering CNC precision automatic lathe and one-time forming technology, make sure the input and output holes are concentric and the interior of the nozzle is smooth without burrs High-Temperature Resistance: The silicone sock is made of high-quality silicone, which can withstand the high temperature of 300℃ and can avoid burns when your hand accidentally touches the print head during printing. also keeps the heater block clean, thus extending the life of the heating block, and helps to keep the temperature at the hot end stable Better Compatibility and Applicability: Suitable for most FDM printing materials such as 1.75mm PLA, ABS, PETG, TPE, TPU, PC, etc<br><br>Colour:Black Material:Hardened Steel<br><br>Package Contents: 5x brass nozzles 0.4 mm 5x Silicone Socks<br><br>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.