Designed for General Purpose Indoor Commercial Use as a Junction, Pull or Switch Box | Ac/mc/hcf/mci-A/ac90/acg90/flex Steel and Aluminum | Secures Emt or Rigid Conduit to Threaded Rod, Insulator Supports, or Mounting Surface | 12.00 in X 12.00 in X 4.00 InSouthern Tier Electric Supply