The Powermaster Surf. Box c/w 20mm KO - 25mm 1G is flush mounted and would be used on single switches such as a 1 gang 2 way switch, as it is the medium depth with knockouts for access. The pack contains one 1 gang pattress box and has hassle free, easy to open polyurethane bag packaging. It requires standard installation tools and should only be installed by a competent, qualified person. It conforms to BS standard 5733.
Individually packed for protection
Conforms to electrical standards