Hybrid ceramic ball bearings 1.Material:Silicon Nitride 2.Used in Electro plating 3.Best price Hybrid ceramic ball bearings Gongtao company specilize in making various ceramic bearing made of ZrO2,Si3N4 ect.Full ceramic bearing have excellence performance as special electrical and magfuteism resistance, wear and corrosion resistance,lubrication and maintenance free when working,especially high ...