Knightsbridge ML accessories, GDM022BC. A 6A, 1 gang, 2 gang dummy dimmer module.
Light switch in the outlook of a dimmer. Designed to be used on grid faceplates where you require the outlook of a dimmer but the function of just a switch.
Module simply clips into position from the front of the mounting frames (sold separately). Please refer to ‘You may also need for full range’