8 Skateboard Stainless Steel Ceramic Bearing Si3N4 Sealed ABEC-5 BearingSkateboard Bearings S608 2RS Ball Bearing 8 Bearings 8x22x7 mm Sealed Bearings S608 2RS Bearing, categorized as low friction 8mm axle skate bearing,Bearings works in skateboards, longboards, inline skates, rollerblades and roller hockey, Bearings are double sealed, radial and deep groove ball bearings,S608 2RS bearings are made from stainless steel with Si3N4 Ceramic (Silicon Nitride) balls, S608 2RS bearing are closed with rubber seals to protect the