Skylux piramide polycarbonaat lichtkoepel 3 wandig pc helder pmma opaal pmma opaal 1100 x 1700 mm KFIW2O H 0750 0750 Roof opening = 1500 Roof opening = 1500 x 1500 mm is not an everyday chore This PVC frame with hinges on short side 0900 x 2100 mm is designed to be installed between the curb and the skylight