65 mm x 100 mm x 18 mm NTN 6013 JAPAN Bearing 65×100×18

JAPAN NTN Bearing offers a 65 mm x 100 mm x 18 mm NTN 6013 JAPAN Bearing 65×100×18 selection of CYRE BEARING LTD Genuine JAPAN NTN Bearing at 65 mm x 100 mm x 18 mm Wholesale Prices. We are Nylon Retainer Material a 65 mm x 100 mm x 18 mm NTN 6013 JAPAN Bearing 65×100×18 Certified Parts Retailer

What is 6013 bearing cross reference？