Box Outlet Phnolc 1G Old 7.5Cu Listed for masonry walls, permissible for use with 90 degree C connectors. For use with non-metallic sheathed cable. UL classified for 2 hour fire wall or fire ceiling. 3-1/4" length x 2-1/4" width x 1-7/16" depth. 7.5 cubic inch capacity. Mounting ears. UL Listed.