Yes. 1 and 1/16. As you can see in the picture that I included the first time, they don't look like the ones you are displaying.
The measurments are correct to a 32nd.
Does a 32nd of an inch one way or another dictate the spring strength?
Before we can answer your first question, we need to determine your balance Series, which is based on your top and bottom attachments. Your Series is also what ultimately dictates what stamp options you have available. The stamp option is what we need to reference when determining what weight your balance can support.
Normally, a channel that is stamped with "29 5" translates to 2950. A 30" non-tilt channel balance with 2950 will carry a window sash weight range of 28 through 32 pounds.
If you feel this is too strong, the 2940 stamp option will carry a window sash weight range of 23 through and including 28 pounds.
This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
Thank you for your answer. Because the window weighs 27 pounds, I could step down to the 29 4 as you say. I will think about this.