689 Full Ceramic Bearing 9x17x5 Miniature Ball Bearings689 Full Ceramic Ball Bearing 9 x 17 x 5 mm 689 Full Ceramic Zirconium Oxide Ball Bearing, the inner diameter is 9mm, outer diameter is 17mm and the width is 689 Hybrid Ceramic Bearings (9X17X4) - Advanced CeramicOrtech manufactures 689 Hybrid Ceramic Bearings for extend service life, reduce wear and minimize friction applications. Find the right Hybrid Ceramic 
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