Varilight 10A 3 way Grey Single Intermediate switch. For your safety, electrical products must be installed in accordance with local building regulations. If in any doubt, or where required by the law, consult a competent person who is registered with an electrical self-certification scheme.. Flat screwless profile intermediate switch with matt satin slate grey finish. 1 gang internal switch, ideal for controlling 1 circuit. 3 way switches make it possible to control the same light from 3 locations. Intermediate switch by Varilight.