Skylux piramide polycarbonaat lichtkoepel dubbelwandig pc helder pmma opaal 1200 x 1200 mm KCB AHH 1800 1800 90 73 63 20 Double walled 90 73 63 20 Double walled Opal (A D) 2 93 W m2 K in combination with a single wall dome maximum daylight surface = rough opening suitable for all types of flat roofsThe Skylux flat roof window is available in as many as 19 different rectangular or square sizes