20 mm x 42 mm x 12 mm NTN 7004DB angular contact ball bearings

NTN Bearing offers a 20 mm x 42 mm x 12 mm NTN 7004DB angular contact ball bearings selection of Genuine Demek Bearing Group Co., Ltd. NTN Bearing at Wholesale Prices. We are a 20 mm x 42 mm x 12 mm NTN 7004DB angular contact ball bearings Certified Parts Retailer 20 mm x 42 mm x 12 mm

What is 7004DB bearing interchange？