ITEM NAME:48DP 3.175mm 16T 17T 18T 19T 20T Pinion Motor Gear for 1/10 RC Car Brushed R6T6 48DP 3.175mm 16T 17T 18T 19T 20T Pinion Motor Gear for 1/10 RC Car Brushed R6T6 Diametral Pitch: 48DP Suitable shaft diameter: 3.175mm Material: 7075 Aluminum Alloy Tip Diameter: 10mm A m3 set screw(12.9 level)has been added to each pinion gear. Teeth: 16T, 17T, 18T, 19T, 20T 16T Size: 9.4 x 9mm 17T Size: 10 x 9mm 18T Size: 10.6 x 9mm 19T Size: 11.1 x 9mm 20T Size: 11.6 x 9mm Weight: 2g / 1Pc Quantity: 5Pcs Package List: 1 x 48DP 16 Motor Pinion Gear 1 x 48DP 17 Motor Pinion Gear 1 x 48DP 18 Motor Pinion Gear 1 x 48DP 19 Motor Pinion Gear 1 x 48DP 20 Motor Pinion Gear 5 x Machine screws 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..1 x 48DP 17 Motor Pinion Gear. 1 x 48DP 18 Motor Pinion Gear. 1 x 48DP 19 Motor Pinion Gear. 1 x 48DP 20 Motor Pinion Gear. Teeth: 16T, 17T, 18T, 19T, 20T. 20T Size: 11.6 x 9mm. 19T Size: 11.1 x 9mm. 17T Size: 10 x 9mm.