I dont know what this is called. It goes on the sides of the window. It catches the balance rod. I appreciate your response on the balance rods that I needed.
Lauren from SWISCO responded:
April 6, 2022
Hello, thank you for posting,
It appears you are in need of a new top sash guide. Please start by reviewing the style and dimensions of the 18-042 guide pair to see how it compares to your original.