Inline Flex Switch Black Standard bakelite-fitting switch For use with standard flex cable Requires no backing box Powermaster Inline Flex Switch - Black | 1730-36 The Powermaster Inline Flex Switch Black - 2 Amp is a standard black bakelite-fitting switch for use with standard flex cable. It fits straight to the flex therefore requires no backing box; it also has the dual use allowing the user to join two pieces of flex. The pack contains one switch 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 is CE approved.