Attributes . 1-1/2" Bore; 2.835" Outside Diameter; 2-1/2" Width; Open Enclosure; ABEC 7 | ISO P4 Precision; Steel Ball Material; 4 (1 Quadruplex Set) Bearings; 60 Degree Contact Angle; Phenolic Cage Material; 1 Rib Outer Ring Raceway Type; Ball Bearing . Names