Item Type: RC Accessories_x000D_Material: Aluminum Alloy, Steel_x000D_Product Size: Approx. 34 x 33. 5 x 27mm / 1. 34 x 1. 32 x 1. 06in_x000D_Fitment: Fit For Traxxas 1/18 RC crawler 1FITMENT: Fit for Traxxas 1/18 RC crawler, reasonable design, easy installation and disassembly, can directly replace the original or damaged parts to obtain higher strength. 2DUSTPROOF: Transmission gearbox helps prevent dust and debris from entering spur gears and pinion gear for a quiet and efficient drivetrain, reliable for use. 3WITH FIXING SCREWS: Strong and powerful, the gearbox can achieve the best performance, improve the overall performance and durability of RC crawler. 4MOTOR GEAR: Built in excellent steel motor gear, delicate and smooth, solve the noise problem of gear transmission, and make the RC car very quiet. 5ALUMINUM ALLOY MATERIAL: RC transmission gearbox housing is made of aluminum alloy material, which is wear resistant, rust proof and durable for better control of RC crawler.