Kinco sngle hung window sash guide

A quick learner from Naples, FL says:
Hi - please tell me which part to order to replace the sash guide as in photos. 18-166 or ???? Thank you!
User submitted photo of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
I would start by looking at our 18-166 Kinco top sash guide. However, it's important that you confirm that our dimensions are the same as your measurements. Compare them and let me know if this is a good match.
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