Part Number for replacement top sash guide

A home owner from Columbia, Missouri says:
There's no markings on the part or window
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Casey from SWISCO responded:

Hello,

Take a look and compare your original guide to our 18-159P top sash guide pair. Dimensions can be viewed on our product page to confirm that this will be a suitable replacement for your original hardware. Please let us know if you need anything else. Thank you!

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