Replacement 18" channel balance 17 9 0LBSI

A quick learner says:
The length of the metal channel is 18 inches.

The stamp on the channel is
17 9 0LBSI (the 0L are tiny compared to other letters)

The windows weigh 22.6 to 23 lbs ( a few different windows that all measure within an inch of each other).

We were online last night, and the stamp on the balance is likely 17-9 BS1 (based on what we found in the charts).

User submitted picture of channel balances.
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Paul from SWISCO responded:
Thank you for your patience in this matter. This style of balance is our S385-18 but you need a custom strength. Please take a look at our Custom Channel Balance Order form I have started for you and fill out the rest of the information. One of our representatives will be in contact with you shortly thereafter.
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