Ready-to-install duct unit with 3 self-locking blind covers for cable routing, consisting of duct base (floor pan with side and floor covering profiles) and duct cover. Floor pan with retaining tabs for the self-contacting installation of dividers. The scope of delivery includes 6 height-adjustable mounting brackets, 6 screed anchors and cover joint seals (3 pieces for duct nominal widths 200 and 300) or levelable cover joint supports: 3 pieces for duct nominal width 400 and 6 pieces for duct nominal widths 500 and 600. Duct cover screwed on and locking elements installed on delivery.