Sash guide identification and part number.

A quick learner from Salinas, CA says:
October 5, 2020
Would you please help in identifying this sash guide and provide me with a part number.
I was not able to identify any numbers letters or manufacturer.
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Tom from SWISCO responded:
October 8, 2020

We don't have this exact top sash guide, but our 18-171 is similar. It just lacks the top cap on yours. Do you think you could still get it to work?
Stepped Sash Guide, Alpine
Stepped Sash Guide, Alpine
18-171
$1.35
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