Series 770 Balance

A quick learner from Ohio says:
The broken balance is stamped 25TG BSI TD It measures 26 inches long and the channel measurements match your "Series 770 Balance"
Product Code: S770-26

I do not know the spring strength to order. Can you determine this from the stamp on the broken part?
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Tom from SWISCO responded:
Can you confirm only the metal channel is 26" long? Usually, an Series 770 balance with a "25TG" stamp is 25" long.

If you are positive you have the S770-26, then I recommend weighing your sash on a scale and referring to the weight chart we have on that store page.
A quick learner from Ohio says:
Despite the stamped 25, the channel measures 26 inches. I will weigh the window sash. Thanks
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