Bob from SWISCO responded:
March 27, 2024
Thanks for posting. This looks like a 15-087 Balance Shoe. This uses Series 180 Coil Balances. That 7 on the shoe might indicate you need an S180-7 7 pound spring, but to be safe, look for a stamp on the actual spring. If there is none, give me the exact weight of the window sash; I can work out the spring weights needed from there. |