65 mm x 140 mm x 33 mm NACHI 21313EX1 cylindrical roller bearings

65x140x33 Bearing 65 mm x 140 mm x 33 mm offers a 65 mm x 140 mm x 33 mm NACHI 21313EX1 cylindrical roller bearings selection of Genuine SKF Wheel Bearings DEVELOP MFG.CORP. 65x140x33 Bearing at Wholesale Prices. We are a 65 mm x 140 mm x 33 mm NACHI 21313EX1 cylindrical roller bearings Certified Parts Retailer

What is 21313EX1 bearing cross reference？