Double gear structure Increase the grip of consumables, Reduce slippage. High transmission ratio Increase torque:Adopting dual bearings to improve transmission performance, accuracy, and stability Increase extrusion thrust:Squeezing and rotating gear bouncing 0.3mm Integrated reduction gear:Cancel the top thread fixation to prevent slipping. Quenched nickel plated gears:The reduction gear and handle gear both adopt a dual bearing design, The two gears have undergone post-treatment quenching and electroplating, making them more wear-, Extend service life and improve printing quality. 4 pcs M3 5mm deep threaded holes, Porous installation, Easy to install and set up flexibly. Installation steps 1. Open the handle and lock the motor with M3*10 flat head screws. 2. Lock the motor with M3*25 screws. 3. Tighten the PTFE nut. 4. Lock the extruder with two M3*6 screws. Colour:As Shown Material:Nylon + carbon fiber The actual product may have slight color difference or difference, which not affect the use Package Contents: 1 * Double Gear Reduction Extruder Kit Only the above package content, other products are not included. Note: Light reflection 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.