608/688 Ceramic Ball Bearing (Si3N4 Ball) (Zro2 Ball)
The ultimate bearing for inline, skate board or luge racers. Solid Si3N4 ceramic roller balls. Ceramic ABEC 7 bearings are used by the serious skater, speed boarder or luge racer.Size 688,mini bearing,8*16*5 Axle 8mm Rings Chromer steel Balls Si3N4 ceramic Cage Nylon Lubrication Speed master oil Seal/Shield Both sides sealed Color Black.Can be made as customer’s reuqest Class Ceramic ball bearing Logo Ceramic 688RS.Can be made as customer’s request