Attributes . 120MM Bore; 180MM Outside Diameter; 56MM Width; 2 Seals Enclosure; ABEC 7 | ISO P4 Precision; Ceramic Ball Material; 2 (1 Pair) Bearings; 25 Degree Contact Angle; Phenolic Cage Material; 1 Rib Inner Ring and Outer Ring Raceway Type; Ball Bearing . Names