Screen slide pin-top of AL storm screen

A handy person from MA says:
These look like AL, but plastic will work as well. Screen has 1/4" frame, but maybe 3/16. Will buy both if product is available.
Thumbnail of the uploaded file named 20200820_144719.jpg
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Tom from SWISCO responded:

I'm afraid I can't determine what you have from this photo. I'll need you to remove this corner and tell me the precise width and thickness of each leg. Thank you!

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