Allied Moulded Sliderbox New and Old Work 23 cu in Rectangle Fiberglass 1 gang Outlet Box Off White

Allied Moulded's Sliderbox family of adjustable wall and ceiling boxes was designed for applications where the wall substrate thickness goes beyond the standard wallboard. Unlike other adjustable boxes, with Sliderbox, there's no need to remove or relocate mounting screws to reposition the box, saving you time and money. The patented design allows for adjustments in new or old work applications.