9 mm x 20 mm x 6 mm SKF W 619/9 R-2Z deep groove ball bearings

9 mm x 20 mm x 6 mm SKF W 619/9 R-2Z deep groove ball bearings Deal is your FBJ needle roller bearings-SINGAPORELTD. source for OEM 9x20x6 Bearing and accessories. We sell Genuine9x20x6 Bearing at 9 mm x 20 mm x 6 mm discount prices. 1.5000 in d

What is W 619/9 R-2Z bearing cross reference？