Hybrid Ceramic Skateboard Bearings with size 8*22*7mm ,the inner ring and outer rings are with material Chrome steel and the balls are made of ceramic ZrO2 or Si3N4 , we are produce bearing with 6 balls ,it is more stroner then 7 balls .
Hybrid Ceramic Skateboard Bearings with size 8*22*7mm ,the inner ring and outer rings are with material Chrome steel and the balls are made of ceramic ZrO2 , we offer free custom service for you .