61801 Full Ceramic Bearing 12x21x5mm61801 Full Ceramic Ball Bearings 12mm x 21mm x5mm 61801 Full Ceramic Ball Bearing, measures an inner diameter of 12mm, outer diameter is 21mm and the width is 5mm, a standard bearing size commonly used in a variety of industrial and commercial applications, Bearing is made from Ceramic. 61801 Ball Bearing Full Ceramic Ball Bearing Cage Material: PTFE (Polytetrafluoroethylene) Balls: Made from Zirconia Ceramic (ZrO) Races Material: Zirconia (ZrO)
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