Terrazzo lined body for height-adjustable cassettes, nominal size R4

Lined body, suitable for polishing, for the direct and jointless installation of round height-adjustable cassettes, nominal size 4, into surface-finished screeds/terrazzo floorings. The casing is laid floatingly onto underfloor boxes with mounting lids of nominal size 4, closing the gaps between underfloor box and cassette frame. The protection cover made from aluminium sheet is put into the cassette frame as a dummy before the screed work is done and can be polished over with the screed or terrazzo.