Attributes . 1-5/8" Bore; 3-7/16" Outside Diameter; 1-5/8" Width; Open Enclosure; ABEC 9 | ISO P2 Precision; Steel Ball Material; 2 (1 Pair) Bearings; 15 Degree Contact Angle; Phenolic Cage Material; 1 Rib Inner Ring Raceway Type; Ball Bearing . Names