45 mm x 100 mm x 25 mm fag 6309 bearing

FAG Bearing 013992088222 Bearing - Housing - Seal UPC offers a 45 mm x 100 mm x 25 mm fag 6309 bearing BEARING FORGE OF AMERICA CORP. selection of Genuine FAG Bearing at Wholesale Prices. We are a 45 mm x 100 mm x 25 mm fag 6309 bearing Certified Parts Retailer 45 mm x 100 mm x 25 mm

What is 6309 bearing cross reference？