I'm looking for the spline for an aluminum storm window. The present spline is approximately 5/16" wide and fits the frame shown in the attachment. The existing dimension appears smaller than the spline shown on your site.
Thanks for your help
Dave Sr. from SWISCO responded:
April 26, 2016
Thanks for posting. I don't believe the glazing spline you need is still available. Take a look at our 59-068 to see if you can use this one as a replacement.