For clear labeling of inserts. When the frame and central plate are dismantled, the label holder remains on the insert. This ensures that switches, sockets or KNX components can be assigned even after renovationxx Accessories Label strips for M-SMART frames with label holder 484100. Scope of delivery 2 label strips and 2 viewing windows per frame. Material: brilliant thermoplastic. Color: glossy polar white. Cradle to Cradle CertifiedTM.