The PCDBCTDM1B is a 1G master touch dimmer switch from the BG Evolve range, finished in black chrome. The BG Evolve range is new on the outside with its polycarbonate front plates but has the same trusted internal technology found in the Nexus Metal range. The Evolve range gives you the ease and flexibility to remove and change the front plates, allowing on-trend finishes without losing the level of quality and reliability.