Switch-Device Outlet Box Extensions (Metallic): Type - Gangable; Material - Steel; Number of Gangs - 1; Box Height - in - 3; Box Width - in - 2; Box Depth - in - 2; Capacity - cu-in - 12.0; Clamps - AC/NM Cable; Mounting Hardware - Bracket, Wrap Metal Stud, 1-5/8"