20 Pcs 608 2RS Ball Bearings – Bearing Steel and Double Rubber Sealed Miniature Deep Groove Ball Bearings (8mm x 22mm x 7mm): Amazon.com: Industrial & Scientific
20 Stück Kugellager, V623ZZ Riemenscheibe, Miniatur Rollenlager aus Karbonstahl für Linearschiene System 3 x 12 x 4 mm : Amazon.de: Gewerbe, Industrie & Wissenschaft
Amazon.com: 608 ZZ Ball Bearings, Skate Bearings Double Shielded Miniature Ball Bearings for Skateboards, Inline Skates, Scooters ABEC 7 Bearing (8mm x 22mm x 7mm) 4PCS : Sports & Outdoors