The ICON SL2430 Skylight Inner Dome is designed to fit a 30-1/4" x 24-1/4" skylight opening.• Finishes the look of your skylight with a 1-1/4" white flange• Clear inner dome• Easy installation• Fits all standard 30-1/4" x 24-1/4" skylight openings• Opening Dimensions: 30-1/4" x 24-1/4"• Outer Dimension: 32-3/4" x 26-5/8" x 4" Easy installation Fits all standard 30-1/4"" x 24-1/4"" skylight openings | Icon Technologies ICON SL2430 Skylight Inner Dome in White