Features Versatile Compatibility: Compatible with for K1, K1C, K1 Maximum, for Ender 3 V3, and for Ender 3 V3 Plus, our extrusion drive gear enhances performance across a wide range of popular 3D printer models. Rustproof Ni Coating: The ni plated gears ensures rustproof and resists erosion, extending their lifespan and providing excellent lubrication, ensuring smoother printing and fewer maintenance issues in the long run. Enhanced Durability: Built from hardened steel, the for K1 series drive wheels are heat treated for an appearance hardness of 55 HRC, ensuring exceptional durability under continuous use without wear. Accuracy Engineering: Featuring an integrated design, this extruder gear offers dependable and accurate filament feeding, enhancing your printing performance and achieving consistent, excellent 3D prints every time. Replacement Kit: Upgrade your existing extrusion system with our all metal dual gear kit, delivering enhanced efficiency and performance in your 3D printer. Specification: Item Type: Extruder Gear Material: Hardened Steel Nano Coating How to Use: Direct installation and use Package List: 2 x Gears 2 x Screws Package List 2 x Gears 2 x Screws