Full Ceramic single side sealed Skate bearings that works in all skate applications that take 8x22x7 608RS bearings, like skateboard, inline skate, rollerblades, roller hockey, and even the 8mm quad rollers, these bearings can be used inline skate, rollerblade, roller hockey. These bearings are to be used for races and competitions, you will need 8 bearings for skateboards and 16 for all other skate applications.