31.00mm overall width 16.00mm bore diameter one blind hole in od, outer ring 254a single row, one-direction locating, two lip inner ring, one lip outer ring with one roller retainment ring on outer, non-separable
1.7500" overall width 50.0mm bore diameter 250c single row, non-locating, cylindrical inner ring, cylindrical outer ring with two roller retainment rings on outer, separable