would like to know something about this one --it has a screw in it it has led inside of the threads and is leaded at the bottom, on one side it has In-56 the other side has <> /24-45 smooth bottom, three piece mold 2 1/4 high 1 1/2 across the bottom, it is clear in color has two wire ridges on it, the screw from the bottom is three inches long, can not find it in the Price Guide, i have two of these Thanks it is a Army Insulator