Made from 4130 heat treated forgings, 2.00" long, for 85mm (3.347") O.D. bearings with 45mm bore with provision for seal (p/n 58509). Drilled for 3" square symmetrical bolt pattern and requires 3/8" diameter stud kit (p/n 58570) to retain caliper brackets. Includes beariungs, washers, lock rings, and seals.