Paul from SWISCO responded:
September 1, 2017
Thanks for your question. We offer a hollow foam seal for the bottom of the vinyl Alcoa sash, our 58-183. The foam bulb is very soft and will collapse when closing the sash. Please compare the 3/16" guide that slides in the sash rail to yours. It's also important to compare the dimensions of the width of the T strip and bubble diameter to ours.
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