storm window spline

A quick learner from PA says:
November 12, 2016
Looking for spline to fit storm metal storm windows that are mounted over
single hung windows.
The larger glass panels are thicker glass and won't permit the use of the standard
spline.
Where can I find an extremely thin spline that t can be used?

Thank you
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Paul from SWISCO responded:
November 15, 2016
I think the thinnest spline we have is our 59-068, which is 3/16" thick. Could you possibly use this?
Universal Glazing Spline, 25'
Universal Glazing Spline, 25'
59-068
$15.95
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