ITEM NAME:2Pcs 48DP 3.175mm 21T Motor Pinion Gear for RC Car Brushed Brushless Motor O1Q2 2Pcs 48DP 3.175mm 21T Motor Pinion Gear for RC Car Brushed Brushless Motor O1Q2 Hard anodized on the gear surface Rust-proof treatment on the surface of gears The gears are milled by precisely Tanwai milling machine A M3 set screw(12.9 level)has been added to each pinion gear Teeth:21T(ï ¿ 12.1*9mm) Diametral pitch: 48 DP Suitable shaft diameter: 3.175mm material:Aluminum alloy colour:Brass color packing include::2 * Motor Pinion Gear 2*Machine meters Screw 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..A M3 set screw(12.9 level)has been added to each pinion gear. Hard anodized on the gear surface. The gears are milled by precisely Tanwai milling machine.