Usage Tips:Speed washers increase speed and promote longer bearing life by reducing friction between the bearing and axle nut and hangar Increase life of bearings Protect your bearings from everyday wear and tear with these Skateboarding Standard Hardware Speed Washers. Washers are used to prevent bearings from rubbing up against the truck hangar& axle nut. Washers increase the life of bearings & provide a much smoother ride. Make your bearings stress-less and prevent your bearings from exploding or seizing Precision tolerances of + / - 0.02mm fitment and super fast bearings every time. Make sure to replace your washers regularly. colour:Silver Material:steel size:Outer diameter about: 11mm Internal diameter: 8mm Package Contents: 100 x Skateboard Speed Washers Only the above package content, other products are not included. Note: Light 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.