65 mm x 90 mm x 13 mm KOYO 6913-2RD deep groove ball bearings

KOYO Bearing offers a Yes (with retaining Bearing Retained 65 mm x 90 mm x 13 mm KOYO 6913-2RD deep groove ball bearings selection BEARING USA CORP. of Genuine 65 mm x 90 mm x 13 mm KOYO Bearing at Wholesale Prices. We are a 65 mm x 90 mm x 13 mm KOYO 6913-2RD deep groove ball bearings Certified Parts Retailer

What is 6913-2RD bearing cross reference？