Creality Ender 3 S1 Pro Metal Extrusion Mechanism Kit, 3D Printer Parts Metal Direct Extruder Kit for Ender 3 S1, S1 Plus, CR-10 Smart Pro, Sprite Extuder

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Direct Drive: Compared with Bowden extruder, the direct drive extruder is compatible with more filament materials and is more suitable for printing flexible materials.
Large Torque, Extrusion Force Up to 80N: The use of gear with 3.5:1 gear ratio which perfectly matches with motor makes extrusion foce up to 80N(depending on filaments). More precise control of feeding withdrawal.
Dual Gear Feeding, More Stable Printing: The double-toothed structure does not damage filaments, feeding it more reliable and stable.
Adjustable tension: The tension allows you to fine-tune the pressure exerted by the drive gears onto the filament according to your perferences which helps to print more exquisite models.