71801 Angular Contact Full Ceramic Bearing 12x21x5mm Inner Diameter - 3 inch (3") outer diameter is 54mm and

outer diameter is 54mm and the width is 27mm H606 16 510* Nachi Bearing

5 70 M10xP1

Equal Federal 9108FF

This set of 16 hybrid ceramic 608 skate bearings is made for serious roller hockey and inline skating performance

and mechanical systems that uses this size 10mm x 15mm x 4mm

71801 Angular Contact Full Ceramic Bearing 12x21x5mm Inner Diameter - 3 inch (3") outer diameter is 54mm and71801 Full Ceramic Angular Contact Ball Bearing 12mm x 21mm x5mm 71801 Full Ceramic Angular Contact Ball Bearing, Bearing is Zirconium Oxide, Bearing inner diameter is 12mm, Bearing outer diameter is 21mm and Bearing width is 5mm, Bearing is made from Ceramic. 71801 Ball Bearing Full Ceramic Angular Contact Ball Bearing Balls: ZrO2 (Zirconium Oxide) Ceramic Cage Material: PTFE (Polytetrafluoroethylene) Dimensions: 12mm x 21mm x 5mm Metric Bearing