MSA39TB04 by Marathon is a factory-sealed, 4-pole NEMA enclosure designed for outdoor use. It is constructed of galvanized steel, with a flush mount, weather-tight front door. The enclosure is rated for NEMA 3, 4, 4x, and 12 protection. It has an overall dimension of 39" H x 39" W x 12" D and a volume of 20.13 cubic feet. The enclosure includes an adjustable mounting bracket, door retainer, and 4 adjustable mounting feet. It also has an internal ground bar for nearly every connection.