Jasmine from SWISCO responded:
October 31, 2023
Thanks for writing in! Your top sash guide appears to be our 18-161 5/8" Norandex Sash Guide. To confirm that this is the correct fit, carefully look over the dimensions shown on the diagram below. I am confident these are the replacement top sash guides you'll need. Detail of 18-161
Profile view of 18-161
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