Item Type: RC Gearbox Cover Gearbox Material: Aluminum Alloy Gear Material: Steel Gear Wheel Teeth Amount: 91T Pinion Teeth: 17T/19T/21T (1Pc each) Application: For ARRMA SENTON Granite Typhon 1/10 RC Car Package List 2 x RC Gearbox Cover 1 x Gear Wheel 1 x Gearbox Accessory 5 x Screw 3 x Pinion 3 x Set Screw 1Applicable Models: RC gearbox case is suitable for ARRMA SENTON Granite Typhon 1/10 RC car, please confirm whether it is consistent with the product you need. 2Quiet Operation: Good machining can reduce roughness and noise, so that the pinion rolling more smoothly, providing a quiet operation when using your RC cars. 3Easy Installation: RC transmission box housing is easy to install and remove, it won't take you too much time, easy to use and fast. 4Premium Material: RC accelerate gear box cover is made of aluminum alloy material, and gears are made of steel material, high strength, durable, wear resistant and more exquisite appearance. 5Light Weight: Aluminum alloy gearbox case is hard and light weight, will not add extra burden to your RC car, practical and convenient for use.