Features: brand new and high quality All-metal aluminum alloy, DIY aluminum block, need to be assembled by itself. Better pressure pushes the filament into the printer nozzle. This is a kit containing some of the most common upgrades for the creality Ender 3 CR10. Our kits include all the necessary screws & parts needed to directly replace your old original weak creality plastic extruder. All you do is unbolt the old original creality plastic extruder & screw in the new "Metal Extruder" and your ready to start printing. Specifications: Item type: CR10 Extruder Kit Material: Aluminum alloy Color: Red, Silver (optional) Style: Left Hand, Right Hand (optional) Package Includes: 1Set x CR10 Extruder 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.