6,35 mm x 15,875 mm x 4,978 mm SKF D/W R4-2RS1 deep groove ball bearings

6,35 mm x 15,875 mm x 4,978 mm SKF D/W R4-2RS1 deep groove ball bearings Deal is your source SKF Wheel Bearings DEVELOP MFG.CORP. for OEM 6,35 mm x 15,875 mm x 4,978 mm 6.35x15.875x4.978 Bearing and Bearings with Housin Type accessories. We sell Genuine6.35x15.875x4.978 Bearing at discount prices.

What is D/W R4-2RS1 bearing cross reference？