50 PCS 608-ZZ Ball Bearing - Double Metal Sealed Shielded Miniature Deep Groove Bearings for Furniture wheel,Skateboards, Inline Skates, Scooters, Roller Blade Skates Single-row bearing for supporting radial loads Shields on both sides of the bearing to keep lubricant in and contaminants out Carbon steel for durability and resistance to deformity under heavy loads Dimensions suitable for use in such applications as skateboards, inline skates, and scooters Tonmp 608-ZZ Ball Bearing - Double Metal Sealed Shielded Miniature Deep Groove Bearings for Furniture wheel,Skateboards, Inline Skates, Scooters, Roller Blade Skates (8mm x 22mm x 7mm)