Feature: 1. Solid Design: This all steel integrated filament drive gear is accuracy machined for exceptional strength and longevity, ensuring dependable performance for your 3D printing tasks. 2. Hardened Steel Gear: Crafted from hardened steel, our drive gear achieves a remarkable hardness of 55HRC through heat treatment, providing high accuracy and durability for consistent filament feeding. 3. Rustproof Plating: Featuring a ni plating, this drive gear effectively resists rusting, enhancing its lifespan while improving lubrication for smoother use during your printing projects. 4. Wide Compatibility: Designed for seamless integration, our dual gear extrusion kit is compatible with popular models like for K1, K1C, K1 maximum, and for Ender 3 V3, ensuring versatile use. 5. Enhanced Printing Performance: This dual gear kit provides excellent torsion and better filament grip, facilitating smoother extrusion and significantly improving your overall 3D printing performance. Specification: Item Type: Extruder Gear Material: Hardened Steel Nano Coating . Package List: 2 x Gears 2 x Screws