1: Scope of application: casual shoes, flat shoes, speed skating shoes, special occasions where roller skating speed is required. 2: Difference from other bearings: high precision and fast speed. 3: White pottery 6 beads. 4: Model: CERAMIC BSB SPEED-11. 5: Dimensions: outer diameter 22mm inner hole: 8mm thickness: 7mm. Board Category: Flat-Plate Type: Skateboard Parts Product name: BSB preciseness skateboard bearing Material:Composite material colour:Silver Package Contents: 16 x Bearing 1 x box 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.