105,000 mm x 190,000 mm x 36,000 mm NTN 6221LLUNR deep groove ball bearings

NTN Bearing offers a 105,000 mm x 190,000 mm x 36,000 mm NTN 6221LLUNR deep groove ball bearings Shandong ZXY Bearing Science & Technology Co., Ltd. selection 105,000 mm x 190,000 mm x 36,000 mm of Genuine NTN Bearing at Wholesale Prices. We Spherical Plain Bear Category are a 105,000 mm x 190,000 mm x 36,000 mm NTN 6221LLUNR deep groove ball bearings Certified Parts Retailer

What is 6221LLUNR bearing interchange？