Item Type: Hardened Steel Nozzle Material: Hardened Steel Package List 5 x Hardened Steel Nozzle 1Excellent Hardened Steel: This nozzle is made of excellent hardened steel, which can withstand high temperature at 500, wear resistant and has a long service life. 2High Accuracy: This nozzle has a sleek, burr free inner wall and the extruder diameter error is less than 0.02 mm. Whether you are printing ordinary filaments or more challenging materials such as carbon and glass fibers, providing you with accurate and fluent extrusion. 3Excellent Performance: This nozzle is for Bambu Lab X1 printer. It is easy to replace the nozzle of your printer with this upgraded version made of hardened steel. It is designed to prevent shedding and reduce the possibility of leakage, while improving wear and tear resistance. 45PCS: 5 for Bambu Lab X1 upgrade nozzles, with a diameter of 0.6 mm each, give you plenty of replacement parts and ensure that you never run out when you need them most. 5Easy To Use: This hardened steel nozzle is very easy to use, you just need to screw it on the printer in the direction of the threads and you are ready to use.