F-Series Triple Gang Boxes are made from durable and lightweight PVC and come with 1/2", 3/4" and 1" entry hubs all in one box. Designed for indoor and outdoor installations, F-Series boxes are weatherproof, corrosion and chemical resistant and feature brass inserts and screws. Utilities cable communications residential airports subways bridges & tunnels mines marinas water/sewage treatment plants pulp & paper industries street & highway lighting food processing plants agricultural parking garages car washes fish plants steel mills 1" conduit opening with 1/2" & 3/4" reducer bushings Made from durable PVC, lightweight with high impact and tensile strength Features molded mounting feet for no loose parts Brass screws and inserts for long life