Colour Family: WHITE Material: POLYPROPYLENE Diameter: 4" - 6" . Comes complete with one soffit vent, three mounting screws and installation instructions, stencil template New revolutionary engineering Mounts under the soffit panel and connects to either 4", 5" or 6" duct Stylish flush-mount design Used mainly to vent bathroom and kitchen exhaust Frost free revolutionary damper system keeps cold air out and helps conserve energy High impact plastic Outer grill and flap prevent pests from entering the home