Casey from SWISCO responded:
May 25, 2020
Hello, The balance you need in this case depends on the diameter of your balance tube. Take a look at our 3/8" S400-30 and 5/8" S500-30 spiral balances to see which matches up to your original. I also recommend weighing your window sash and following the chart under the product description to choose the correct tip color. Thank you! |