Milgard 5521 5571 series

A quick learner from California says:
October 8, 2020
needed gasket seals for Milgard windows series 5521/5571
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Tom from SWISCO responded:
October 12, 2020

I'm not sure what these seals may be. Can you remove one and show me a picture of the end profile? The video below will explain what I mean.
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