Paul from SWISCO responded:
July 12, 2021
Hello, We believe you have a similar style pivot shoe to our 15-191, which usually works with the Series 160 coil spring. Your spring looks different, though. Instead of installing in the shoe with tabs, it hooks in that little prong there. I think you could still use our 15-191 and Series 160 though, you would just have to replace the balances on both sides. If your sash weighs exactly 40 pounds, you can use two of the S160-10 coils on each side of the window. Thank you! |