20 mm x 52 mm x 15 mm NSK 21304CDE4 spherical roller bearings

Spherical Roller Bearings offers a 20 mm x 52 mm x 15 mm NSK 21304CDE4 spherical roller bearings selection of Genuine Spherical Roller Bearings 20 mm x 52 mm x 15 mm at 0.008 to 0.023 mm Radial Clearance Wholesale Prices. We NTN DRIVESHAFT ANDERlu, INC. 2,120 N Dynamic Load Rating are a 20 mm x 52 mm x 15 mm NSK 21304CDE4 spherical roller bearings Certified Parts Retailer

What is 21304CDE4 bearing interchange？