This is the exterior glazing bead from a vinyl casement window (May be a Willmar brand?) No name on window just a glass pack the homeowner had in the garage that said for Willmar windows. It is 5/8"x5/8"
Paul from SWISCO responded:
May 26, 2020
We unfortunately don't carry any glazing with that triangular shape, but we do have a vinyl sash glazing with the same kind of locking tongue you show. Check out our 55-015 and see if you can use this.