1. High-quality gear set (self-printed) kit for HGX-extruder extruder, small size, light weight, large mission ratio, high torque. 2. High-quality hardened steel nickel-plated gear set, so that you can have more consumables to choose when using 3D printers. 3. At the same time, the larger extruder wheel increases the grip of the consumables and reduces slippage. The larger mission ratio increases the torque, extruder thrust and printing quality. 4. Increase the torque and concentricity. The hardened steel gear has a larger mission ratio, increases the torque, and has high concentricity. Note:There may be slight differences and color differences in the actual appearance due to different batches, which will not affect the use. Colour:Black Material:Hardened Steel Package Contents: 1 set * extrusion head fittings 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.