1.50" long, for 85mm (3.347") O.D. spherical bearings with 45mm bore with a seal (p/n 58527). Drilled for 3" square symmetrical bolt pattern and require 3/8" diameter studs (p/n 58577-2) to retain caliper brackets. Attachment nuts (p/n 21FC-624) and washers (p/n AN122584) are available separately. The complete housing end kits are p/n 58577-KIT (for 11-3/4" disc brakes) or 58577-KIT-B (for 11-7/16" disc brakes).