4 free skylights. 42 years old but solid. From my garage. Dirty with moss etc. in picture one I sanded one corner clean to show that it will clean up and can then be painted. (I did that 20 years ago and they turned out really good.). They are not glass. It’s a heavy duty plastic. It doesn’t show very well but in the 4th picture I cleaned a square in the middle. It cleaned up quite well. There is a bit of a haze to the plastic after all those years in the elements. Apparently there is a product that will clean up the haze. Not sure. Regardless they will clean up and let light in. The 3rd picture shows the underside. Inside plastic part is 22” X 46”. Outside is 52” X 28”. Thanks. Paul