1、Perfect Fitment: Suitable for brushless brushed motor with 3.17mm shaft diameter for 1/10 RC car, simple and practical RC car accessories. 2、Rust Proof: Exquisite workmanship, pay attention to details, the gear surface is hard anodized and rust resistant for long lasting performance. 3、Easy Installation: Equipped with screws, gear can be easily installed on motor, simple operation, bring you convenience, wonderful replacement for the broken one. 4、Portable Design: Help improve RC car performance, light weight and in small size, easy to store and carry, suitable for RC car store and outdoor use. 5、Aluminum Alloy Material: Motor pinion gear adopts high quality aluminum alloy material, safe and eco friendly, firm and wear resistant, corrosion resistant and durable. Item Type: Motor Pinion Gear Material: Aluminum Alloy Weight: 9g / 0.3oz(approx.) Type: RC car accessories Gear Inner Ring Diameter: Approx. 3.17mm / 0.1in Applicable Models: For 1/8 1/10 RC car truck brushed brushless motor 3 x Gear 3 x Screw