4" Octagon Box with "J" Bracket - 1-1/2" Deep"J" Bracket has 2 spurs and slotted holes fortoe-nailing with gauging notches 3/8" and 1/2"4 NM cable pri-outs, non-metallic cable clamps2 side & 1 bottom knockout 1/2"15.5 cu. in., U.L. Listed