30 mm x 72 mm x 21 mm NTN SX06B81LLUANPX1V deep groove ball bearings

YOU’LL NTN BEARING CORP.OF AMERICA FIND 16.9 kg Mass AN EXTENSIVE 30 mm x 72 mm x 21 mm SELECTION OF 30 mm x 72 mm x 21 mm NTN SX06B81LLUANPX1V deep groove ball bearings FOR SALE.

What is SX06B81LLUANPX1V bearing interchange？