1、Excellent Hardened Steel Material: This 3D printer nozzle is made of excellent hardened steel material, and the inserts are made of red copper, which is more wear resistant and conducts heat faster. 2、Sleek Inner Surface: The inner surface of this 3D printer nozzle is sleek and burr free, and the flat end of the nozzle is easier to bond with the heating element, which effectively prevents the filament from leaking out of the heating end and reduces the risk of clogging. 3、Good Compatibility: This 3D printer nozzle is compatible with for Ender 3, for Ender 3 Neo, for Ender 3 V2, for Ender 3 V2 Neo, for Ender 3 Pro, for Ender 3 Max, for Ender 3 Max Neo, for Ender 5, for Ender 5 Pro, for Ender 5 Plus, for CR6 SE, for CR10 Smart, etc. 4、Multiple Sizes: This 3D printer nozzle set has 4PCS MK8 0.4mm, 2PCS of 0.6 and 0.8MM nozzles, which can meet your different usage needs. 5、Wide Application: This 3D printer nozzle set has a wide range of applications and can be used for DIY, crafting, modeling. Item Type: MK8 Hardened Steel Nozzle Material: Hardened Steel, Red Copper Size: Thread M6 Approx. 13 x 7mm/0.51 x 0.28in Applicable Consumables: Approx. 1.75mm/0.07in Outlet Caliber: Approx. 0.4mm/0.015in, 0.6mm/0.023in, 0.8mm/0.03in Maximum Printing Temperature: 580°C Features: Hardened Steel: High Temperature Resistant, Wear Resistant, Triple Output Flow Rate, Higher Flow Rate, Increase Printing Speed. 4 x 0.4mm MK8 Nozzle 2 x 0.6mm MK8 Nozzle 2 x 0.8mm MK8 Nozzle