ITEM NAME:Extruder Upgrade Replacement Kit, Aluminum MK8 Extruder Drive Feed For CR-10S img *{margin:0;padding:0;.A premium upgrade for your 3D printer,thts extruder assembly is quickly and easily installed improving the performance and reliability of your 3D printer. supplied plastic assembly will do. This upgraded is suitable for Ender 3,Ender 3 Pro,Ender 5, CR-10.