Plastic boot for metal slider.
A quick learner from Fort Mill, SC says:
April 19, 2016
I need about 12 of the plastic boots for the metal sliders for the window described in image #2. They lose there shape over one and the spring separates from it.
Tom from SWISCO responded:
April 21, 2016
Thanks for contacting us. I'm afraid we cannot replace this pivot shoe by itself. The manufacturer no longer designs this balance with that groove, so you will need a new balance system entirely. See our Series 795 for the modern replacement.