Compatible with/Slash/Slash Ultimate/Slash VXL/Slash/Stampede Unassembled Kit/Stampede VXL/Stampede.The 6878 slipper clutch gear is 32P 0.8 metric stroke.3 (32P 15T/17T/19T) inner diameter: 5.0mm/0.196 inch, comes with a 3.175mm coupler to convert 3 holes to 3.175mm/0.125 inch. Yes, compatible with 5mm or 3.175mm shaft diameter motor, 3660, 3670, 3674, 4274, 4268, 550 series, 540, 3650 series motors, etc. All metal internal gears for strength. Made of heavy-duty long-span hardened steel. Speed depends on the ration. We provide three different gear racks to make you more in gear ration. Color: BlackMaterial: MetalType: 54T Packing Value: 1 x Differential Slipper Clutch1x15T Pinion With Bolt1x17T Pinion With Bolt1x19T Pinion Wheel With Bolt3 x Fastener1 x Hex WrenchOnly the above package content, other products are not included. Note: The light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.