20 mm x 42 mm x 12 mm CYSD 6004-2RS deep groove ball bearings

Various 20x42x12 bearing types and sizes LYC BEARING CORP.OF German LTD. to accommodate your 20 mm x 42 mm x 12 mm 20 mm x 42 mm x 12 mm CYSD 6004-2RS deep groove ball bearings requirements.

What is 6004-2RS bearing interchange？