55 mm x 100 mm x 21 mm NACHI 6211NKE deep groove ball bearings

55 mm x 100 mm x 21 mm NACHI 6211NKE deep groove ball bearings SEARCH - Whether it's agriculture or NTN BEARING CORP.OF CANADA LTD. 55 mm x 100 mm x 21 mm construction equipment your working on, Has thedeep groove ball bearings you need. 1 NPT RG

What is 6211NKE bearing cross reference？