608 Full Ceramic Skate Bearing 8mm x 22mm x 7mm 608 Full Ceramic Skate bearing that works in all skate applications like skateboard, inline skate, rollerblades, roller hockey, And even the 8mm quad rollers, Bearing can be used inline skate, rollerblade, roller hockey, Bearing can be used for competitions or racings, You will need 8 bearings for skateboards and 16 for all other skate applications.