Designed to fit into the 16 on center (406mm) opening between studs in a standard 2x 4 (51mm x 102mm) wall. For both new work and old work applications. The box has 4-gang standard NEMA size openings and is designed to accommodate power, communications, and A/V devices. The box has been designed with a cable pass-through capability, allowing multiple service access points to be daisy chained together, eliminating the need for multiple conduit runs. Box includes temporary cover. Finished cover assembly (EHWB4C)sold separately. Finish - White