The BES Series of non-metallic box extenders adds 5/8 in. of height and 5.3 cu in. to 10.5 cu in. of volume to an existing electrical box The BES Series of non-metallic box extenders adds 5/8 in. of ...

Levels and supports the wiring device where the box is set back from the wall surface. Levels and supports the wiring device where the box is set back from the wall surface.