This item is currently out of stock.
Roof skylights take a lot of UV exposure and can cloud, crack, or leak over time. This Bri-Rus dome is a like-for-like replacement sized to fit a 22" x 22" rough opening, with a 25" x 25" flange-to-flange measurement for common RV roof cutouts.
Measure both your rough opening and overall exterior cutout before ordering, since skylight sizing varies between manufacturers.