Features:  Compact Size: Size about 48x42x25mm and 102g lightweight. It is suitable for Creality 3D Printers Ender-3/Ender-3 V2/ Ender-3 Pro /Ender-3 S/CR-10 S/CR-10/CR-10 S5/CR-10 S4/CR-10 Mini/CR-20/CR-20 Pro; And compatible with most FDM 3D printers on the market as well.  Easy Replacement: Both push-type and knob-type filament replacement are available. Quick release design, more efficient disassembly and installation, and hotend can be replaced quickly.  High Torque: Adopt 3:1 gear ratio, dual gear meshing structure, more reliable and stable feeding and printing.  Wide Compatibility: Applicable with Bowden and Direct Drive feeding to meet different users need. Driver drive more stable and it is recommended when printing with flexible filaments TPU.  Modular Design: Users can upgrade to a higher torque motor with ease. Easy maintenance for various parts as well.  Adjustable Spring: Adjust the spring pressure base on different filaments for more stable retraction, which results in more beautiful model.    Specification:  Model: E·Fit   For: Most FDM 3D printers on the market; Creality 3D Printer Model Ender-3/Ender-3 V2/ Ender-3 Pro /Ender-3 S/CR-10 S/CR-10/CR-10 S5/CR-10 S4/CR-10 Mini/CR-20/CR-20 Pro  Product Size: (LxWxH) 48x42x25mm (without motor and accessories)  Drive: Dual gear drive  Gear parameters: Module: 0.5, Number of teeth: 48  Material: Carbon steel  E-STEP: 405 (can be fine-tuned according to actual printing conditions)  Applicable filament: 01.75+0.05mm  Packing Size: 115x75x90mm /4.5x2.9x3.5in  Packing Weight: 300g/10.5oz    Packing List:  1 x E·Fit Extruder  1 x Backplate  1 x Fan adapter plate   1 x Cable ties  2 x Wrench  1 x Air guide part  1 x Screw Kit  1 x Connector  1 x Silicone pad   1 x Tube  1 x Motor cable