50 mm x 90 mm x 49,21 mm Timken E50KRR deep groove ball bearings

Timken Bearing offers a 50 mm x 90 mm x 49,21 mm Timken E50KRR deep groove ball bearings selection of Genuine Timken Bearing B04264 Product Group at Wholesale Prices. We are a 50 mm x 90 mm x 49,21 mm Timken E50KRR deep groove ball bearings JOD Machinery Co., Ltd. 50 mm x 90 mm x 49,21 mm Certified Parts Retailer

What is E50KRR bearing cross reference？