See pics for best description. I am selling as is and as seen.  I do not know exactly what these glass dome light covers fit.  Research showed that they may be some time of aircraft light cover made by Grimes company.  I am not sure about it. If you are interested, please be sure they meet your needs from the pictures and I also will be happy to provide specifics about them.  They are red glass dome-shape covers with a hole in the top center.  One has diameter of 4 3/8 inches and one (with clamp) is only 4 inches. One has a metal cap in the hole but it is missing on the other.  One also has a clamp at bottom.  Height is about two inches on both.  The one without clamp has one speck on it which you can see in 3rd pic at the 1 o'clock position.  They each weigh about 7.5 ounces.  Thanks for viewing my item.