Round device insert with floor covering protection frame for the installation of installation devices for universal use in duct systems, raised and hollow floors with wet-cleaned floor coverings. Hinged lid with concentric rings structured. Surface metallically bright with fine groove structure, painted recesses. Floor covering protection frame and hinged lid made of die-cast aluminum, tube made of die-cast zinc. The minimum installation depth is 80 mm when using device cups GB3 or MT4 and 65 mm when using device cups MT45V0.
