Octagon box, 3-1/2" with four 1/2" side conduit knockouts and one 1/2" bottom conduit knockout. Drawn construction, can be used in the installation of ceiling or wall lighting fixtures or as a junction box. Not designed for ceiling fan support. 50 pound maximum recommended static load. 1-1/2" deep, 11.8 cubic inch capacity. UL Listed, acceptable for use in 2-hour fire rated walls. UPC bar code.