Features 1、Premium Material: Made of high quality steel material, has excellent and reliable performance, is sturdy, durable and has a long service life. 2、Easy to Install: With fixing screw holes, easy installation and simple operation, with M4 set screws and wrench, hole diameter is 5mm/0.2in. 3、Anti Rust Surface: The gear surface is hard anodized, and the surface is treated with anti rust, which has long lasting performance. 4、Withstand Great Force: 17T pinion motor gear can withstand greater force and make your remote control car perform better, improve the power of the RC car. 5、Applicable Model: Suitable for ARRMA Granite, for Big Rock, for Typhoon, for Senton 3S brushless brush series 1/10 RC car, suitable for 5mm shaft diameter motors. Item Type: 17T Pinion Motor Gears Material: Steel Color: Black Weight: Approx. 13g / 0.5oz Number of Teeth: 17T Hole Diameter: Approx. 5mm / 0.2in Modulus: 0.8MOD Radial Spacing: 32P Product Diameter: Approx. 15mm / 0.59in Product Height: Approx. 14mm / 0.55in Application: Suitable for ARRMA Granite, for Big Rock, for Typhoon, for Senton 3S Brushless Brush Series 1/10 Remote Control Car, Suitable for 5mm Shaft Diameter Motors Package List 1 x 17T Motor Gear 2 x Set Screws 1 x Wrench