The ICON SL1430 Skylight Inner Dome is designed to fit a 29-3/4" x 13-3/4" skylight opening.• Finishes the look of your skylight with a 1-1/8" white flange• Clear inner dome• Easy installation• Fits all standard 29-3/4" x 13-3/4" skylight openings• Opening Dimensions: 29-3/4" x 13-3/4"• Outer Dimension: 31-7/8" x 15-7/8" x 3-5/8" Clear inner dome Easy installation | Icon Technologies ICON SL1430 Skylight Inner Dome in White