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 strip for 1-M frame with label holder 387100. Scope of delivery 1 label strip and 1 viewing window per frame. Material: brilliant thermoplastic. Color: glossy polar white. Cradle to Cradle CertifiedTM.