ITEM NAME:16x ABEC-7 Skateboard Longboard 608zz Skate Roller Hocker Wheel Steel Bearings Descriptio n Description: High rotation speed Double-sided dust cover, with good dust prevention effect Widely used in the plate, skateboard, machinery, electric tools, models, electric cars, scooters, etc Specifications: Material: Bearing steel Color: Silver Model: 608ï ¼Ë†ABEC-7ï ¼â€° Inner diameter: Approx 8mm / 0.3 inch Outer diameter: Approx 22mm / 0.8 inch Height: Approx 7mm / 0.3 inch Package Included: 16 x Skate bearings Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! 16x ABEC-7 Skateboard Longboard 608zz Skate Roller Hocker Wheel Steel Bearings.Widely used in the plate, skateboard, machinery, electric tools, models, electric cars, scooters, etc. Double-sided dust cover, with good dust prevention effect. Specifications:Material: Bearing steel.