Product Name: Upgrade MK8 Extruder Color: Red / Champagne gold For To: CR-7/CR-8/ CR-10/CR-10S Filament : 1.75MM This modified MK8 Extruder has a filament guide tube, all screws, spare drive gear, and upgraded Bowden tube fitting, for CR-10 3D Printer. Our design gives complete support of flexibles from the intake and output ends. We've reduced the price and complexity of printing flexibles. It will also allow to print faster with sustained quality and no risk for grinding the filament. Package list: Red / Champagne gold Extruder x 1pcs