... , like skateboard, inline skate, rollerblades, roller hockey, and even the 8mm quad rollers, these bearings can be used inline skate, rollerblade ... applications.Item: 608 skate bearings Type: Full Ceramic Bearing Size: 8mm x 22mm x 7mm Dimensions: 8*22*7 mm/Metric ... ID (inner diameter)/Bore=8mm OD (outer diameter)=22mm Width/Height/thickness=7mm Inner/outer ...