ITEM NAME:RC Car 5Pcs 5mm Shaft 32DP Motor Gear 17T 18T 19T 20T 21T Pinion Replacement Description: For 5mm Shaft 1/10 brushless brushed RC Car Motor hard anodized motor on the surface of the gear The anti-rust treatment on the gear surface The gears are ground by precisely An M4 adjustment screw (12.9 level) has been added to Each pinion Size Chart: 17 T Diameter: 15.1mm/0.59inch 18 T Diameter: 15.9mm/0.63inch 19 T Diameter: 16.7mm/0.66inch 20 T Diameter: 17.5mm/0.69inch 21 T Diameter: 18.3mm/0.72inch Package Includes: 5 Pieces Motor Gear(17T 18T 19T 20T 21T) SKU: DMO0015841261003376.5 Pieces Motor Gear(17T 18T 19T 20T 21T). For 5mm Shaft 1/10 brushless brushed RC Car Motor. hard anodized motor on the surface of the gear. The gears are ground by precisely. SKU: DMO0015841261003376.