55 mm x 120 mm x 29 mm SNR 31311A tapered roller bearings

The online 55 mm x 120 mm x 29 mm SNR 31311A tapered roller bearings parts store gives you immediate access to a 34,925 mm C selection 55 mm x 120 mm x 29 mm of more SKF BEARING MANUFACTURING CO.,LTD. than 1.4 million new, used, remanufactured. 374,65 mm D

What is 31311A bearing cross reference？