May be installed between the dryer and the booster fan to help reduce lint build-up in duct and maintenance to the fan. Improves drying capacity. 26 gauge corrosion resistant, satin coat steel can be painted to match decor. Mounts flush to drywall surface. Ceiling or wall mount option. 9/16" mounting flange. One piece door with integral screen. Galvanized mesh filter. Sturdy slide mechanism is simple to use. This optional lint trap can be used with Dryer Booster Kits.