Gangable 3 in x 2 in switch box, offers the option of constructing a box to hold two or more devices. Two 1/2 in conduit knockouts (end). One 1/2 in conduit knockout (bottom). Plaster ears allow the box to be used in old work applications. Acceptable for use in 2 hrs rated fire walls. 1-1/2 in D. 7.5 cu-in. UL listed.