2MB-P

Two Gang Masonry Box - 46.8 Cubic Inches - 3-3/4 Inches Long x 3-3/4 Inches Wide x 3-1/2 Inches Deep - 1/2 Inch and 3/4 Inch Concentric Knockouts - Galvanized Steel - Welded Construction - with #12 AWG Solid Ground Wire Pigtail.