Features WIDE COMPATIBILITY: Compatible with popular DIY 3D printers such as for CR10, for Ender, for D9, for Anet E10, Et4, for Geeetech, for Mizar S, for Cr10S Prusa I3, and for Ender 3 Pro, making the extruder suitable for a majority of printers on the market. HIGH ACCURACY AND EXCELLENT PERFORMANCE: Equipped with high accuracy CNC hardened steel internal parts, ensuring smoothly filament feeding and optimal performance during printing. VERSATILE COMPATIBILITY: Works with all open source 3D printers that use 1.75mm diameter filaments, providing strong compatibility with a wide range of materials. 3:1 GEAR RATIO AND DUAL GEAR REDUCTION MECHANISM: Features a 3:1 gear ratio and dual gear reduction mechanism, delivering stable filament feeding without slipping and providing greater torsion for extrusion. ADJUSTABLE SPRING DEVICE: Allows users to fine tune the pressure exerted by the dual drive gears on the filament, making it easier to switch between different materials and ensuring optimal extrusion. Feature: 1. TRANSPARENT DESIGN: The transparent material allows users to better observe the extrusion process, ensuring smoothly operation and identifying any potential issues, especially with flexible materials like TPU. Specification: Item Type: Dual Drive Gear Extruder Material: Metal, High Density Engineering Plastic Package List:1 x Extruder  1 x Extrusion Wheel  1 x Electric Frame 1 x Pneumatic Quick Hose Fitting  2 x Hex Wrench  3 x M3 x 35 Screws  1 x Tighten Adjustment Screws 1 x 2 x 4 x 100mm PTFE Tube1 x Spring  1 x Washer1 x Hook1 x Manual  Package List 1 x Extruder 1 x Extrusion Wheel 1 x Electric Frame 1 x Pneumatic Quick Hose Fitting 2 x Hex Wrench 3 x M3 x 35 Screws 1 x Tighten Adjustment Screws 1 x 2 x 4 x 100mm PTFE Tube 1 x Spring 1 x Washer 1 x Hook 1 x Manual