I need two. The metal is 18 inches long. The pictures should tell you the rest. I also have another window that measures 24 inches but I neglected to add those photos onto this inquiry.
Tom from SWISCO responded:
February 28, 2017
Thank you for posting. We recommend you taking a look at S395-18 with the 1730 option. Please let us know if this is a good match for you.