Feature:1. Premium Material: Metal slipper gear set, made of hardened steel material, more wear resistant and durable.2. Accuracy Gears: The metal gear set adopts accuracy manufactured gear teeth for stable, consistent performance and low noise.3. Wide Compatibility: 91T metal gear, compatible for Arrma Senton 1 or 10, for Granite, for Big Rock, for Vorteks, for Typhon and other RC cars.4. Multi Specification Small Gear: RC car slipper gear assembly, with 17T, 19T, 21T different T number small gears, more widely used.5. Easy To Install: RC replacement metal gear assembly, easy to install and remove. Secure fit to help improve RC car performance.Specification:Item Type: Slipper Gear SetMaterial: Aluminum Alloy and SteelNumber of Large Gear Teeth: 91TNumber of Small Gear Teeth: 17T, 19T, 21T (One for Each)Applicable: for Arrma Senton 1 or 10, for Granite, for Big Rock, for Vorteks, for Typhon and Other RC CarsPackage List:1 x Large Gear3 x Small Gear3 x Set ScrewNote: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. ",