This 48DP 3.175mm 16-20T motor pinion gear is made of hight quality aluminum 7075、 which is suit for brushed/brushless motors.Features:Suit for 1/10 RC cars.Originally Aluminum 7075.Hard anodized on the gear surface.A m3 set screw (12.9 level) has been added to each pinion gear.Specifications:Teeth: 16T、 17T、 18T、 19T、 20T16T Size: ¡é9.4 * 9mm17T Size: ¡é10 * 9mm18T Size: ¡é10.6 * 9mm19T Size: ¡é11.1 * 9mm20T Size: ¡é11.6 * 9mmDiametral Pitch: 48DPSuitable shaft diameter: 3.175mmMaterial: Aluminum 7075Weight: 2g / 1PcQuantity: 5PcsPackage Information:Package size: 10 * 6 * 1cm / 4 * 2.4 * 0.4inPackage weight: 13g / 0.46ozAdehesive tape packagePackage List:1 * GoolRC 48DP 16 Motor Pinion Gear1 * GoolRC 48DP 17 Motor Pinion Gear1 * GoolRC 48DP 18 Motor Pinion Gear1 * GoolRC 48DP 19 Motor Pinion Gear1 * GoolRC 48DP 20 Motor Pinion Gear