These double surface mounted pattress back box and made from modern plastic (bakelite). Back boxes are used behind the plate switch or wall socket, they allow the face plate to be screwed and secured to a wall. The back box itself should be screwed into position. Depth is determined by the number and size of the wires to be contained, The more and thicker the wires the deeper the box needs to be. These fittings can be used in many domestic and commercial applications.
Double Switched Socket 13 amp BS1363 with brass terminals. Fits any twin (2 gang) back box
Double blanking plates to cover unused back boxes
Metal Flush Mounting Back Box. Double 2gang 35mm deep