Kqcibz Bearing type: Hybrid ceramic bearings Shield: double-sided dust cover Size (Inner x Height): 8 x 22 x 7mm 608 Bearing Skateboard Dedicated Colour: black+white+red Material: composite material Package Contents: 16 x Skateboard wheel bearings Notice: Please do not bear the bearings for jumping or other strong impact actions. lubricants are not required. 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.