POWERPART C-Line Range. Bagged with Header card. 1 x C-Line Circular Back Box DARK GREY Fits Recessed Powerpart C-Line Sockets & Switches. C-Line is a modular range of wide range of electrical Components & Facias that mix and match to suit whatever your requirement you have. They are interchangeable with CBE Style Facias etc. Fitted in a wide range of Caravans & Motorhomes including Bailey, Elddis, Adria & Coachman.