Merten 433714, rocker, IP44, symbol window, anthracite System M - variety without limits In System M, surfaces and materials can be combined almost without limits. Without having to change the inserts, the frames and rockers are easily interchangeable. This makes System M one of the most flexible switch ranges that adapts to all design wishes. An important part of the diverse solutions and products of the Merten brand are the Merten switch ranges. In this area, Merten offers you a large selection of numerous, high-quality flush-mounted and surface-mounted models for every area of application and every environment. You will always find the right switch at Merten.