SWC TBX-325 Msonry bx xtns Ring Thr

2-1/2in deep Three gang Extension Ring masonry boxes are used for mounting switches plugs outlets and other electronic and electrical devices in masonry brick and 4in block walls. Gangable masonry boxes offer installers the ability to add devices in the field. Garvin' extra deep design allows for deep devices numerous wires switches and other electronic and electrical devices.