Upgraded Aluminum Dual Gear Pulley Dual Drive Extruder + 4x Leveling Spring + 2x MK9 Silicone Cover + 1M PTFE Tube Kit For Creality CR-10 / CR-10S / CR-10S Pro / Ender-3 / Ender-3 Pro 3D Printer

Advantage: 1. Double gear extrusion mechanism, high extrusion force, ensuring smooth feeding 2. The original 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 5. Better pressure pushes the filament into the printer nozzle Package included: 1 x Dual Pulley Extruder 1 x 1M PTFE Tube 2 x MK9 Silicone Cover 4 x Leveling Spring