Optimized for Creality K1 Series: This K1 Max Extruder upgrade kit is compatible with Creality K1, K1 Max, K1C, -3 V3, and -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 high-quality print results 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 Note: Light reflection and different display settings may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.