Feature:1. Aluminum Alloy: The housing of metal transmission gear box adopts aluminium alloy, which is wear resistant, rustproof and more stable.2. Steel Bearing: This LCG chassis gearbox adopts anodic oxidation and steel bearing, suitable for carbon fiber LCG chassis rails.3. Low Noise: The inner gear is exquisite and glossy, solve the noise problem of gear transmission, make the RC car drive very quiet.4. Powerful Performance: Strong and powerful, the gear box can achieve the best performance and improve the overall performance and durability of the RC car.5. Easy Installation: This 1/10 transmission gearbox is easy to install and remove, light weight will not overload your vehicle or affect the speed.Specification:Item Type: Metal Transmission GearboxMaterial: Aluminum Alloy, SteelColor: BlackNumber of Pinion Teeth: 9TGear Ratio: 9:1Total Length: Approx. 77mm / 3.03inInstallation Length: Approx. 72mm / 2.83inHeight: Approx. 51mm / 2.01inTotal Width: Approx. 48mm / 1.89inInstallation Width: 37.5mm / 1.48in (Hole to Hole)Application: Suitable For 3.17mm Shaft Diameter Motor, Suitable for 1/10 Remote Crawler Truck, Suitable for Carbon Fiber LCG Chassis Guide Rail.Package List:1 xMetal Transmission Gearbox1 x Gear2 x Accessory10 x ScrewNote:1. For manual measurement, please allow 1 to 3mm error. Thank you very much!2. Display calibration is inconsistent, and the colors of the items displayed in the photos may be slightly different from the actual objects.