Bearing spacers are designed to create a nice smooth axel spin and will help prevent your bearings from collapsing, and the bearing will be motionless without the bushing. These spacers will fit all standard skate wheels. Description: Material: Aluminum Color: Gold Quantity: 8 pieces Inner diameter: Approx 8mm / 0.3 inch Made of high quality Aluminum, durable and useful These are basic replacement bushings for most skates Package Includes: 8 x Skate bearing spacers bushings Note: The skate bushing will get abrasion after long time use, in order to keep the wheel bearing smoothly, it ’s necessary to change the bearing bushing regularly