100% brand new and high quality Features: Full metal aluminum alloy, aluminum block to assemble yourself. With better pressure stronger pushing the filament into the printer nozzle. Aluminum alloy controller power for CR-10 / CR-10S / CR-8 / CR-7, it is stable and durable. This modified MK8 extruder has a filament guide tube, all screws, replacement drive Upgraded Bowden Tube Gears and Fittings, for CR-10 3D Printer. Our design gives complete flexible support of the inlet and outlet ends. We have reduced the price and complexity of flexible patterns. It also enables faster printing with sustained quality and no risk of filament grinding. Specifications: Product name: Upgrade MK8 Extruder For: CR-7 / CR-8 / CR-10 / CR-10S Filament: 1.75mm Color: silver Note: No retail package. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package Includes: 1Set x MK8 Bowden Extruder