Description: M1 20T 21T 22T Pinion Motor Gear for 1/8 RC Buggy Car Monster Truck 20T-22T pinion motor gears combo Includes set screw Made of high quality material chrome black HRC45-48 Durable metal construction for long-lasting performance Rust-proof treatment on the surface of gears For 5mm shaft motor of 1/8 RC off-road buggy monster truck Suitable shaft diameter: 5mm Material: Metal Color: Black Size Chart: Teeth: 20T 21T 22T Height: 14mm Tip diameter 20T: 22mm 21T: 23mm 22T: 24mm Package Includes: 3 Pieces Pinion Motor Gear