Bob from SWISCO responded:
September 24, 2023
Thanks for posting. Is this top sash guide partly broken or missing a bottom portion? It looks like it is but I can't be certain. The 18-161 seems to be our closest match based on the dimensions given and the design. Please compare the dimensions below to your old guide and let me know what you think. Profile view of 18-161
Detail of 18-161
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