Top sash guide ID

A quick learner says:
I guess i ordered the wrong size, 18-183. Do you have this?
User submitted photos of a top sash guide.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting. I'm afraid we do not have an exact match for this top sash guide. The closest we have is our 18-184, but I'm not sure if this can work. Look it over and tell me what you think.
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