Window Balance sash guide

A handy person from Florida says:
Attached are two profiles from the piece that attaches to the window. This accompanies a 1/2" 28c channel (non Tilt). Please let me know what part number to purchase.
A customer submitted photo of a top sash guide.
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Mike from SWISCO responded:
Thanks for posting on the discussion board.

Start by taking a look at the 18-110 Top Sash Guide, Seasonall.
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