Searching for .4375 spline

A quick learner says:
I have an screen door that is an insert. I can come out and a storm door put in. I am needing a 7/16 flat spline. Do you carry it?
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Tom from SWISCO responded:

I'm not sure what it is you're looking for, but we do carry the 55-109. Does this match what you have now? If not, then we need to see a clear picture of its end profile. The video below will explain what I mean.

55-109 : 25' Rigid Screen Spline
25' Rigid Screen Spline
55-109
$15.30
VIEW >
Identifying Replacement Weatherstripping
Identifying Replacement Weatherstripping
VIDEO
WATCH >
How to rescreen a Forever Storm Door insert
How to rescreen a Forever Storm Door insert
VIDEO
WATCH >
Close-up of 55-109 Screen Spline Install
Close-up of 55-109 Screen Spline Install
VIDEO
WATCH >
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