*8519 BOX, GANGBOX 3X2X2-1/2 | Four cable knockouts (end). One 1/2 in conduit knockout (bottom). With clamps for non-metallic sheathed cable. 3 in x 2 in x 2-1/2 in D. 12.5 cu-in. Adjustable plaster ears allow box to be used in old work applications. Acceptable for use in 2 hrs rated fire walls.