Description Integrated Axle Design - Improve concentricity,reduce gear eccentricity. Extended Gear Life - The overall hardness (HRC) of 62-65 and hardness() of 1000-1200. Gear Materia - Constructed from high-strength mold steel with a nano-coating treatment. Consistent Extrusion - Solve the common problems of extruder inconsistency and poor filament grip, ensuring smoother, more reliable printing performance. Precision Bearings - Double can reduce the and improve the feeding accuracy of the extruder. Nanocoated Mold Steel Integrated Extruder Gear for neptune 4. Use one shaft design Higher gear ratio Nano-coating treatment Concentricity is better Greater extrusion force Colour:Black Material:Metal Package Contents: 1 * 3D Printer Extruder Gear 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.