Features 1、Hard Steel Material: Made of high quality metal steel material with high strength and wear resistance, having good performance for long service life. 2、Fine Workmanship: Pinion gear outer layer has received hard anodic oxidation and rust proof treatment, able to ensure a satisfying using and long service life. 3、Easy to Use: Come with fixing screw hole, easy for installation and operation, the package will come with M4 set screws, making your installation and repair more effortless. 4、High Performance: Small size and light weight, these features can give full play to the best performance, improving the RC vehicle power and overall performance. 5、High Force Loading: Has the ability to withstand high force, making your remote control car have a satisfying property. Suitable for 5mm/0.2in shaft diameter motor. Item Type: RC Motor Gear Material: Steel Color: Black Teeth: 15T, 17T, 20T Application: for ARRMA Granite, for Big Rock, for Typhoon, for Senton 3S Brushless and Brushed Series 1/10 Remote Control Vehicle Applicable Motor: 5mm/0.2in Shaft Diameter Motor Hole Diameter: 5mm/0.2in Product Size: 15T: Diameter: Approx.13mm/0.51in Height: Approx.13mm/0.51in 17T: Diameter: Approx.15mm/0.6in Height: Approx.14mm/0.55in 20T: Diameter: Approx.17mm/0.7in Height: Approx.14mm/0.55in Gross Weight: Approx.31g/1.1oz Module: 0.8MOD Radial Spacing: 32P Package List 3 x Motor Gear 3 x Set Screws 1 x Wrench