I need to know what this part is so I can replace broken ones around my home. Maker of the windows is milguard.
Tom from SWISCO responded:
October 31, 2018
I'm not sure if we have this exact glazing, but we have a couple that are similar. See our 55-080 and 55-156 to start out. Carefully compare our measurements and photos to yours and see what you think. You can also order a sample of each from this page.