Paul from SWISCO responded:
September 7, 2017
Looks like you need the glazing bead. I'm afraid I can't be 100% sure what you have based on these pictures. We would need to see its end profile. That said, look at our 55-194 glazing bead. This has been known to work on the Milestone 1000 series window. That said, I highly recommend removing a sample and comparing it to the 55-194 to confirm it matches up.
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