The Steel Outdoor Electrical Box Enclosure by Thomas & Betts 125 a max is a durable and waterproof solution for protecting electrical 8 components . Made of steel with a stainless steel finish, this rectangular box is 12 x 15 x 4 inches in size and features a wall mounting style. Perfect for both indoor and outdoor use, this gray enclosure is designed for a single phase electrical setup and is ideal for businesses and industrial applications.