Arlington’s non-metallic RainBox™ is the raintight, labor-saving solution to installing a fan or fixture exposed to the elements, inside or outside. This box eliminates the need for time-consuming field modifications. It’s completely sealed so water stays out and wiring stays dry. Plus, it supports a 70lb fan or fixture securely and safely. The oversized medallion of the FBC4225 accommodates canopies up to 7" in diameter