Arlington Industries FBC4225W-1 Raintight FanBox, Accommodates Canopies up to 7" in Diameter (Pack of 1), 21 cu. In, White Arlington's non-metallic rainbox is a raintight, labor-saving solution to installing a fan or fixture exposed to the elements, inside or outside Rainbox eliminates the need for time-consuming field modifications Completely sealed so water stays out and wiring stays dry Supports a 70Lb fan or fixture securely and safely 21.0 cu. Inch box - ul/csa listed - industry standards for safety and quality