Pack of 100 608B Fidget Hand Spinner Black Bearing with Bronze Cage 8x22x7 mmPack of 100 608B Fidget Hand Spinner Black Bearings with Bronze Cage 8mm x 22mm x 7mm Metric 100 608B Fidget Hand Spinner Bearings, Deep Groove Radial Ball Bearing, bearings are black and has Bronze Cage that would make them faster, Bearings are made of Chrome Steel. Item: 608B Ball Bearing Type: Fidget Hand Spinner Bearing Color: Black Closures: Open Cage: BRONZE(less friction=higher speeds) Dimensions: 8mm x 22mm x 7mm Metric ID (inner diameter)