Groove Track Roller Bearing, 20mm×52mm×22.6mm Stainless Bearing Steel U Type Groove Track Guide Roller Bearing LFR5204-16 KDD NPP for Industrial Linear Motion(LFR5204-16 NPP Rubber Cover): Amazon.com: Industrial & Scientific
LUANAYUN-PHONE CASE Flexible Durable 6904 Hybrid-Keramik-Kugellager, 20 x 37 x 9 mm, ABEC-1 Fahrrad-Tretlager & Ersatzteile Si3N4 Kugellager 6904RS 6904-2RS : Amazon.de: Sport & Freizeit
Amazon.com: New Lon0167 6mmx13mmx3.5mm Full Ceramic Zirconia Oxide Ball Bearing 686(6mmx13mmx3.5mm Vollkeramik Zirkonoxid Oxid Kugellager 686 : Industrial & Scientific