45 mm x 68 mm x 12 mm NTN 6909ZZ deep groove ball bearings

The online 45 mm x 68 mm x 12 mm NTN 6909ZZ deep groove ball bearings parts store gives you immediate 45 mm x 68 mm x 12 mm -40 °C Min operating temperature, Tmin access to a NTN BEARING CORP.OF AMERICA selection of more than 1.4 million new, used, remanufactured.

What is 6909ZZ bearing cross reference？