Dimensions - 132mm (w) x 75mm (h) x 47mm (d) Installing electrical faceplates in plasterboard? This double 2 gang back box makes it easy. It's 47mm deep and comes with adjustable lugs, so you get a secure... Common face plates which may be used with a back box are light switches, plug sockets, modular systems, Ethernet sockets and any other deep wall plates. 2 Gang 47mm Dry Lining/Plasterboard Box - Black | Scolmore (WA107PBK Plasterboard Back Box 2x 47mm Deep Double Dry Lining Wall Flush Back Box Plasterboard Will secure to plasterboard (or other surface) 3-18mm thick Double Dry Lining Pattress Box - AJ Horseboxes : AJ Horseboxes 47mm Plastic Double Gang Back Box - Flush Mount Technical Specification: Standard UK sized back box Will secure to plasterboard (or other surface) 3-18mm thick Dimensions - 132mm (w) x 75mm (h) x 47mm (d)