Floor duct flush with screed with foil sheet steel BKF 300x (145-190) mm. Screed-flush installation duct according to DIN EN 50085-1 and DIN EN 50085-2-2, with flexible foil formwork, consisting of: duct side profiles made of aluminum, crossbars, screed anchors, floor covering application profiles (0 or 4 mm) made of plastic, leveling clamps with duct connectors and leveling pins, screwed blind covers, suitable for dry-maintained floors, acoustically decoupled, pre-assembled at the factory.