Amazon.com: (10 PCS) 608ZZ 8 x 22 x 7 mm Deep Groove Ball Bearing, Double Metal Shielded, Fit for Skateboard Bearings, 3D Printer RepRap Wheel, Longboard, Roller Skates, Inline Skates, Scooters etc. :
Amazon.com: NO-LOGO Bearings for Desktop 3D Printer Special Bearing 608ZZ ABEC-5 8X22X7mm Mute Speed Miniature Ball Bearings ZZ809 for Reprap Prusa i3 Parts 10PCS (Size : ABEC 5) : Industrial & Scientific
Amazon.com : Adventure World 608ZZ ABEC-7 Skate Wheel Bearings, Spacers and Washers Kit (Skateboard and Inline Skate) (4 Wheel Pack (8 Bearings, 8 washers, 4 spacers)) : Sports & Outdoors