Features 1、The end face thickness is processed to 3mm, which can cover the screw head, thus saving weight and space, flip the gear to easily change the gear deck height by 3mm. 2、The center hole allows you to use shafts and tubes up to 32mm in diameter, compatible with any 1302 or 1305 series clamping hub. 3、Using the pinion, you can create a 3:1 reduction or overspeed setting according to your application. 4、When used in conjunction with a 30-tooth servo gear, this combination produces a 3:1 underspeed, which reduces the final speed and increases the torsion by 3 times. 5、Convenient to use and with good performance, with small size, easy to carry and store. Specification Item Type: 90 Tooth Cylindrical Aluminum Gear Material: Aluminum Complete removal of anodizing Number of Teeth: 90 Gear Pitch: Approx. 0.8mm / 0.03in Pressure Angle: 20° Quantity: 1 Center Hole: Approx. 32mm / 1.3in Package List 1 x Gear