A contractor from carmel indiana says:
March 26, 2014
i need 25 feet of square screen spline. i have enclosed a picture. there is enough detail to zoom in on the spline.
Paul from SWISCO responded:
March 27, 2014
I'm afraid we don't carry this spline. However, you may be able to use our 59-150S spline instead. Check it out and see what you think.