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689 Full Ceramic Bearing 9x17x5 Miniature - VXB Ball Bearings689 Full Ceramic Zirconium Oxide Ball Bearing, the inner diameter is 9mm, outer diameter is 17mm and the width is 5mm, this is a popular size that could be 9x17x5mm Ceramic Ball Bearing | 689 Ceramic Bearing9x17x5mm Ceramic Ball Bearing also known as a size 689 bearing689 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