ITEM NAME:Cr10 Pro Aluminum Upgrade Dual Gear Extruder Kit for Cr10S Pro Reprap A7D4 Cr10 Pro Aluminum Upgrade Dual Gear Extruder Kit for Cr10S Pro Reprap Prusa I3 1.75Mm Drive Feed Double Pulley Extruder A7D4 Item Type: Extruder Model Number: CR-10S PRO Material: aluminum alloy Suitable: For CR-10, For CR-10S, For Ender-3, For Ender-3 Extruder Type: Bowden Extruder Usage: 3D Printer Parts Filament: 1.75mm Color:Red Advantage: 1. Double gear extrusion mechanism, high extrusion force, ensuring smooth feeding 2. The aluminum alloy driver is supplied with CR-10S PRO. It can also be installed in Ender-3, Tornado stable and durable. 3. All-metal aluminum alloy, diy aluminum block, need to be assembled by itself 4. High quality and 100% brand new 5. Better pressure pushes the filament into the printer nozzle Package Contents: 1 * Extruder kit and screw package Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.