SKF,NSK, Tr, Asahi, NTN, Fk, Fyh Mounted Ball Bearing, Insert Ball Unit Bearing,Stainless Steel UCP Housing Pillow Block Bearing,Agricultural Machinery Bearing

How do you find 5.5000 in d the SKF,NSK, Tr, Asahi, NTN, Fk, Fyh Mounted Ball Bearing, Insert Ball Unit Bearing,Stainless Steel UCP Housing Pillow Block Bearing,Agricultural Machinery Bearing specification? Manufacturers Online Open closure type: Free 053893613994 manufacturer upc number: check！