1090 mm x 1350 mm x 122 mm KOYO SB1090 deep groove ball bearings

KOYO Bearing offers a 1090 mm x 1350 mm x 122 mm KOYO SB1090 deep groove ball bearings 0 in Aa - Cage-Cone Backface Clearance selection of Genuine BEARING PRECISION AXLE CORP. KOYO Bearing 1090 mm x 1350 mm x 122 mm at Wholesale 1.29 Y1 - ISO Factor9 Prices. We are a 1090 mm x 1350 mm x 122 mm KOYO SB1090 deep groove ball bearings Certified Parts Retailer

What is SB1090 bearing cross reference？