10pcs 688-2RS Ball Bearings Set, Rubber Sealed Deep-Groove Ball Bearings Metal Bearing for Small Hobby 5mm Shaft or Rod Projects, 8x16x5mm: Amazon.com: Industrial & Scientific
688-2RS Bearings, 8x16x5mm Ball Bearing 688RS Double Rubber Sealed Shielded Bearing ID 8mm, OD 16mm, Thickness 5mm Pre-Lubricated Deep Groove Ball Bearing for 3D Printer, Scooters 4pcs: Amazon.com: Industrial & Scientific
Enduro Bearings EB SS 688 2RS - 8X16X5 : Amazon.de: Sport & Freizeit
688 2RS / 688RS Kugellager 8x16x5 mm DIN 625-1 Industriequalität mit Leichtlauffett 2RSR 2RS1 : Amazon.de: Baumarkt