22.5 Cu. In. 4" dia. round fan support box for use with nonmetallic sheathed cable - Polyurethane flange for single drywall offset, machine tapped fixture holes, rigid hard box construction, no distortion with high temperatures, shatter resistant with low temperatures - New work residential construction 2 HR fire resistive walls and ceilings (35 lbs. fan support and 50 lbs. fixture support) - air tight - Fiberglass reinforced polyester - thermoset box - Size: Depth=2 7/16", Dia=4" - Mount with Nail-on with fetter ring nails - Speed Klamps™ factory installed
