40 mm x 68 mm x 40 mm SIGMA GEH 40 ES plain bearings

plain bearings offers a 40 mm x 68 mm x 40 mm SIGMA GEH 40 ES plain bearings NTN BEARING CORP.OF CANADA LTD. selection of Genuine plain bearings at Wholesale Prices. We are a 40 mm x 68 mm x 40 mm SIGMA GEH 40 ES plain bearings 40 mm x 68 mm x 40 mm Certified Parts Retailer

What is GEH 40 ES bearing cross reference？