Item Type: RC Car Gear Set_x000D_ Material: Aluminum Alloy and Steel_x000D_ Gross Weight: 86g / 3.0oz_x000D_ Big Gear Numbers: 91T_x000D_ Pinion Numbers : 17T, 19T, 21T (each)_x000D_ Suitable: for Arrma Senton 1/10, for Granite, for Big Rock, for Vorteks, for Typhon, etc 1Strong and Durable: This metal gear is made of aluminum alloy and hardened steel, high quality, not easy to damage, more durable. 2Stable Performance: This gear set features accurate manufactured gear teeth for stable, consistent performance and low noise. 3Easy to Install: This gear set is easy to operate, easy to install and also easy to disassemble, easy to learn, perfect for RC cars. 4Wide Application: This remote control car gear set is matched with pinions of different T numbers, which can be applied to more types of remote control cars and has a wider range of applications. 5Applicable Models: Suitable for Arrma Senton 1/10, for Granite, for Big Rock, for Vorteks, for Typhon and other remote control cars, suitable for various models.1 x Big Gear 3 x Pinion 3 x Machine Screw Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.