Hubbell Raco 3-Gang Masonry Box, Nongangable, Nineteen Concentric KOs, Gray, 3-3/4" x 5-19/32", 697

Rugged welded design does not fall apart during construction. | Available from one to six gang configurations in both 2-1/2" and 3-1/2" depths. | Rectangular shape fits square cuts in block. | Large volume design allows for additional work room inside the box. | Standard 1/2" and 3/4" concentric knockouts. | Device ears inside the box prevent mortar from getting in the device holes. | Steel voltage partition #971 fits all 2-1/2" or 3-1/2" depths. | Supplied with nineteen (19) 1/2 & 3/4 in. concentric knockouts