Dry Lining Plasterboard Socket Box 1 gang For use on single switches Size: 32mm Powermaster 1 Gang Single Dry Lining Plasterboard Socket Box | 1523-10 The Powermaster Dry Lining Box - 32mm 1 Gang is a white bakelite box. It is for use on single switches such as a dual immersion switch, as it is for use on hollow walls or cavities where extra grip is needed for the fitting to remain in place. The pack contains one 1 gang pattress box and has hassle free, easy to open polyurethane packaging. It requires standard installation tools and should only be installed by a competent, qualified person. It conforms to BS standard 5733.