Casey from SWISCO responded:
May 10, 2021
Hello, Take a look and compare the specifications of our S770-27 channel balance with a 27E strength option to your original assembly. Thank you! |
Casey from SWISCO responded:
May 11, 2021
Thank you for bringing this to our attention. You most likely have an older version of the S770 balance. I suspect that the S770-28 with a 28E strength option will work for you, but I recommend weighing the window sash and reviewing the chart under the balance product description to make sure that you choose the correct strength option for your balances. |