Feature:1. The unique feeding gear, can minimize slippage and increases feeding capacity.2. Can provide greater torsion to the extrusion, while reducing the burden on the motor and extending the life of the motor.3. The extruder is suitable for various materials of nylon and soft TPU/TPE, and is used for consumables of 1.75 mm.4. The fastening spring device allows the user to fine-tune the pressure exerted on the consumable by the dual drive gear.5. Suitable for CR10 Ender 3 pro 3D printer, with great workmanship, perfect replacement for the old one.Specification:Item Type: 3D Printer Extruder KitMaterial: PlasticFilament Diameter: Approx. 1.75mm / 0.1inSuitable for CR10 Ender 3 pro 3D printer Package List:1 x Extruder1 x Shell 2 x Hex Wrench1 x Gasket1 x Plastic Tube3 x Screw1 x Fastening Spring1 x Gear