The CER GFB series of floorboxes are available in 1, 2 and 3 gang configurations for both shallow and deep slab construction. A wide range of options including tile and carpet flanges, device plates for decora, duplex and GFI receptacles, and brass or nickel plated finish to suit any decor. CER GFB series of floorboxes are "Scrub Test Approved" and are adjustable both before and after concrete pour.