4 Pieces Aluminum Wheel Bearing Spacers Skateboard Scooter Quad Roller InliIne Skate<br /><br /><br /> Specifications:<br /><br /> Material: Aluminum<br /> Color: Silver, as showed<br /> Outside Diameter: Approx. 8mm<br /> Inside Diameter: Approx. 6mm<br /> Length: Approx. 24mm<br /> <br />  Body Diameter: Approx. 11mm<br /> <br />  Weight: Approx. 2.5g<br />  <br />  Features:<br />  These minimize drag on your bearings.<br />  Solid aluminum construction dissipates head and will last longer than other plastic. <br />  Reduces heat buildup and road vibration<br />  It can upgrade your 4-wheel skates.<br /><br />Suitable for skateboards, stunt push kick scooters, quad roller skates etc.<br /><br />Package Includes:<br />4X Wheel Bearing Spacer