Optimized for Creality K1 Series: This k1 Max Extruder upgrade kit is compatible with Creality K1, k1max, 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 not only prevents rust but also enhances the lifespan and lubrication of the gears, ensuring smoother operation and less maintenance. Superior Durability and Hardness: Constructed from all-steel, the filament drive wheel in this kit is heat-treated to a surface hardness of 55 HRC, designed to withstand continuous use and resist wear, prolonging the life of your 3D printer. Enhanced Printing Performance: The machined, integrated design of the filament drive wheel ensures precise and reliable filament feeding, leading to consistent, high-quality prints and improved performance of your 3D printer. Comprehensive Upgrade Solution: This kit includes a double bearing gear upgrade in hardened steel DLC gold and an 0860 reduction gear, providing a complete solution to enhance the efficiency and durability of your 3D printer. Colour:As Shown Material:Metal Package Contents: 1 set * printing accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.