Description: Skateboard hardware set includes 8pcs speed washers, 4pcs bearing spacers, and 4pcs nuts Speed washer is made of iron, used to increase speed and promote longer bearing life by reducing friction between the bearing and axle nut and hangar Bearing Spacer is 8x11mm, used to improve skateboard stability and reduce wheel shake, keep bearings parallel, improve rotating speed and precision, reduce bearing wear and tear Screw Nuts for truck repair or rebuild kit, 8mm inner diameter, and 6mm high Speed kit Fit on almost skateboard/longboard trucks Specification: For Washers: Outer Diameter: Approx. 11mm / 0.43inch Inner Diameter: Approx. 8mm / 0.31inch For Spacers: Size (H x OD.): Approx. 11x8mm / 0.43x0.31inch For Nuts: Size (Inner Diameter x H): Approx. 8x6mm / 0.31x0.24inch Package Includes: 4 Pieces Nuts 8 Pieces Washers 4 Pieces Spacers Note: Please allow slight size deviation.