Description Using a 8-tooth 36 tooth stepper motor, the torque has increased by about 25% compared to the previous 10 teeth, providing higher extrusion force to the extruder with a reduction ratio of 6.25:1 The adopts a type of CNC hollow POM gear, which has higher strength and accuracy. Isolation and positioning of bearings and gears, seamless assembly, higher accuracy. Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Colour:As Shown Material:Aluminum+POM Package Contents: 1 * Black gear 1 * Pulley 4 * Shim 2 * 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.