Features: brand new and high quality Made of high-quality metal materials, the appearance is exquisite, strong, comfortable and durable. The Extruder is designed with a opening knob on the side that holds one of the dual-drive gears. This knob is closed with a spring-tensioned thumbscrew. This thumbscrew enables an exact tension of the drive gears for the proper hold on the filament, with the ability to release the strain and simply load or unload the filament. Double the gears and double the fun, two drive wheels grab the filament from each side to provide a solid and reliable feed for the hot end. . The dual drive gears of the extruder can provide a consistent flexible filament flow in a direct drive or Bowden configuration. The light-weight style of the Dual Drive extruder makes it useful for direct drive configurations. Specifications: Product: 3D printer Gear Name: Extruder Gear Support Filament: PLA/TPU/ABS/PETG mpetible: 3D Printer Parts Geared Extruder Filament Diameter Supported: 1.75mm Weight:75g Compatible Stepper Motor: Nema17 (5mm shaft) Note: It's a simple way to install the dual drive extruder, it only takes 6 steps. 1.Remove the original extruder. 2.Remove the old gear from the motor. 3.Replace it with the new gear and lock the screw, watch out the direction of the gear. 4.Place the motor back carefully. 5.Place the extruder on top. 6.Fasten the three new bolts we provided. Instead of pulling from the Inlet of the extruder, pull from the outlet. This is to help prevent the filament from sticking in the extruder. When you do a cold pull, the filament is usually more substantial at the tip. So, if you pull from the PTFE tube side, this will take the thin side of the filament through the extruder resulting in an easy atomic pull and an unblock nozzle. 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: 1 Set Dual Drive Extruder