Icon Technologies's Skylight Inner Dome for a 30" x 22" Skylight opening. Complete your replacement with a new outer dome, SL2230. • Finishes the look of your skylight with a 1 1/2" white flange • Clear Inner dome • Easy installation • Made in North America • Fits all standard 30" x 22" skylight openings. • Opening Dimension: 30" x 22" • Outer Dimension: 33" x 25 1/4" x 2" OR 3" Finish off your replacement with an ICON skylight | Icon Technologies Skylight Inner Dome, Low Profile, for SL2230 in White