Optimized for Creality K1 Series: This K1 Max Extruder upgrade kit is compatible with Creality K1, K1 Max, K1C, Ender-3 V3, and Ender-3 V3 Plus models, ensuring a perfect fit and seamless integration with your existing 3D printer setup. Advanced Nickel Plating Technology: Featuring nickel plating, this upgrade kit helps prevent rust and enhances gear lifespan and lubrication, promoting smoother operation and reduced maintenance. Superior Durability and Hardness: Constructed from all-steel, the filament drive wheel is heat-treated to a surface hardness of 55 HRC, designed for durability and resistance to wear during extended use. Enhanced Printing Performance: The machined, integrated filament drive wheel design ensures precise and consistent filament feeding, supporting reliable print quality and improved printer performance. Comprehensive Upgrade Solution: This kit includes a double bearing gear upgrade made from hardened steel DLC gold and an 0860 reduction gear, offering a complete solution to improve the efficiency and longevity of your 3D printer. Color: As shown. Material: Metal. Package Contents: 1 set x printing accessories. Only the items listed are included; other products are not part of this package. Note: Lighting and display differences may cause slight variations between the image and actual color. Measurement may vary by +/- 1-3 cm.