Middle Atlantic 1RU Utility Rack Mounted Shelf - 10.8in Depth Solid Rack Shelf - U1General Information Manufacturer: Legrand Group Manufacturer Part Number: U1 Manufacturer Website Address: http: www. legrand. us Brand Name: Middle Atlantic Product Series: U Product Model: U1 Product Name: Middle Atlantic 1RU Utility Rack Mounted Shelf 10. 8in Depth Solid Rack Shelf Marketing Information: The Middle Atlantic U1 is a robust 1RU rack mounted shelf designed to provide reliable storage and support for your equipment. With a depth of 10.