608 Hybrid Ceramic 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 ,this bearing have a high precision, free in spin and competitive price .
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 ,with that design ,the bearings are can run a fast speed and bear higher loading.