ITEM NAME:10pcs Skateboard Truck Axle Speed Washer Speed Ring Longboard Hardware Description: - Made of high quality iron, durable, sturdy - 10pcs per pack - Increase speed and promote longer bearing life by reducing friction between the bearing and axle nut and hangar - Fit on almost skateboard/longboard trucks - Suitable for longboard, skateboard, cruiser, etc. Specification: - Material: Iron - Color: Black - Diameter: Approx. 11mm / 0.4in - Thickness: Approx. 1mm / 0.04in Package Included: 10 Pieces Speed Washers Note: If not sure if our products are suitable for your skateboard, please contact with us for confirmation..Suitable for longboard, skateboard, cruiser, etc. - Increase speed and promote longer bearing life by reducing friction between the bearing and axle nut and hangar. 10 Pieces Speed Washers. - Color: Black.