This Nexus 800 series white moulded 20A 16AX intermediate light switch from BG should be used as the middle switch when you need to operate one light from three different locations such as at the top and bottom of the stairs and at the end of a hallway or landing. Its moulded white front-plate has a high resistance to fading, discolouration and scratches, with inherent anti-microbial properties proven to reduce bacterial development and inhibit the growth of infectious diseases. Finished with soft rounded edges and screw caps for a sleek appearance.