6 Velux sky lights = 2 mechanical opening and 4 fixed frame Outside dimension: 21.5 inches wide by 38 inches long. Frame dimension 21 5/8 inches wide by 38 3/4 inches long. Argon Glass dimension fixed frame 18.25 inches by 35.5 inches. Argon Glass dimension opening frame 16 5/8" X 33 3/8". Colour: Taupe/brown. All argon double glazed units are clear and seals are sound with out fogging or condensation. All six skylights come with top, bottom side flashing, channel gutters, NEW roles of Velux skylight under layment, specialized screws, hardened aluminum nails and manuals.