Thermo isolation box for external venetian blinds is well designed construction part which brings lots of useful features. These come especially from the PURENIT material characteristics which the boxes are produced from.
minimum box lenght D: 450 mm
maximum box width in one piece: 3500 mm
maximum dimension A: 600 mm
maximum dimension C: 600 mm
maximum box depth B: 400 mm
If the box is longer than 3500 mm (board size) it is supplied in more pieces which need to be connected later together see boxes connection straight and angled