Petersen Window Weatherstipping

A handy person from Marine City, MI 48054 says:
The bottom flat rail of the weatherstipping 7/16 to 1/2 inches and the piling is roughly 3/16". The bottom rail slides into two fine grooves.
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Tom from SWISCO responded:
Thanks for posting! Have you seen our 58-050? This has a base of 7/16" but a pile height of 13/32". Would that be too high? Take a look and see what you think.
A handy person from East China, MI says:
This pileing is to used on the vertical rails of the movable window. It also is used at the top & bottom of the sash. It also is used on the top rail. What is in the bottom track is a "connundrum" to me. Also would like to now about the vertical "L" shaped weather stripping, is a vinyl type material. As for 58-050 weather stripping, it could work. Where might I go to see these things?
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Tom from SWISCO responded:
You can look at the 58-050 on its product page. Check out that link and also the link on the right side of this page.

I'm not sure what the "L" shaped weatherstripping is. Could I see a few pictures of its cross section? If I can see its shape and dimensions, it might help us determine what it is.
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