7 white ceramic beadsHigh temperature, corrosion, and wear resistanceHigh-speed nylon cage, lightweight and suitable for highly corrosive environmentsThis bearing Shields on both sides keeping lubricant in and contaminants out.Small size,lightweight,easy to carry and install.Notice:Please do not bear the bearings for jumping or other strong impact actions.lubricants are not required.Bearing type: Hybrid ceramic bearingsShield: double-sided dust coverSize (Inner x Outer x Height): 8x22x7mm608 Bearing Skateboard DedicatedMaterial:Mixed Materialcolour:Black + WhitePackage Contents:24 x Skateboard wheel bearingsOnly 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.