Description: M1 17T 18T 19T Pinion Motor Gear for 1/8 RC Buggy Car Monster Truck 17T-19T 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: 17T 18T 19T Height: 14mm Tip diameter 17T: 19mm 18T: 20mm 19T: 21mm Package Includes: 3 Pieces Pinion Motor Gear