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Casey from SWISCO responded:
November 8, 2023
Hello, We can't be positive without seeing the original hardware removed from the window but you could start by comparing the S900-31 spiral balance with a 3/8" diameter housing tube to yours. As for the colored tip option, there is a chart under the product description that explains how to choose your option based on the sash weight. 
How to measure the tube length of the S900 spiral balance.
If you have any reservations, feel free to get back to us with photos of your parts and we can go from there. Keep in mind that the cam style, along with the width and thickness, are key factors when it comes to choosing the correct pivot shoe. Thank you! 
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