ITEM NAME:M1 5mm 18T 19T 20T 21T 22T Shaft Steel Pinion Motor Gear Combot Set for A7H6 M1 5mm 18T 19T 20T 21T 22T Shaft Steel Pinion Motor Gear Combot Set for A7H6 Made of high quality material Easy to install and durable in use Hard anodized on the gear surface Rust-proof treatment on the surface of gears Durable metal construction for long-lasting performance This M1 5mm 18T-22T pinion motor gear combo set is meshed perfectly to drive motor, it provides great wheel speed and plenty of torque. 1 set: 5Pcs Teeth: 18T 19T 20T 21T 22T Height: 14mm Tip diameter 18T: 14*20mm 19T: 14*21mm 20T: 14*22mm 21T: 14*23mm 22T: 14*24mm Color:ï ¼Å¸Black Material:ï ¼Å¸steel Suitable shaft diameter: 5mm Package List: 1 * M1 5mm 18T Pinion Motor Gear 1 * M1 5mm 19T Pinion Motor Gear 1 * M1 5mm 20T Pinion Motor Gear 1 * M1 5mm 21T Pinion Motor Gear 1 * M1 5mm 22T Pinion Motor Gear Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Teeth: 18T 19T 20T 21T 22T. 21T: 14 23mm. 1 M1 5mm 21T Pinion Motor Gear. 20T: 14 22mm. 19T: 14 21mm. 1 M1 5mm 20T Pinion Motor Gear. 1 M1 5mm 19T Pinion Motor Gear. 22T: 14 24mm.