Rv Skylight- Outer Dome-Rectangle-White   RV Skylight has rough hole opening of 18"x24" and flange of 21.5"x27.5", with a height of 5 inches. DOES NOT INCLUDE INNER GARNISH (must be purchased seperate). High performance polycarbonate skylights are virtually unbreakable and easy to clean. To determine which skylight you need, use a size that is equal to or greater than the rough hole opening in your roof. Skylights sit directly on your RV roof. Use inner garnish to finish the inside hole. No metal flange is used with these single pane skylights. Includes 1 year manufacturer warranty.   Note, inners must be the exact size as the hole you are working with. 1 per box.   Please note that displayed image may not accurately represent actual product.   Available sizes and colors:   Item Number Rough Hole Flange x Flange Color 313122 14†x 22†17†x 25†White 313123 14†x 22†17†x 25†Smoke 313124 14†x 30†17†x 33†Smoke 313125 18†x 24†21†x 27†White 313126 18†x 30†21†x 33†Smoke 313127 22†x 22†25†x 25†White 313128 22†x 22†25†x 25†Smoke