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Bob from SWISCO responded:
September 24, 2023
Hello there. Based on your photos I think this is either an S351-28 or S390-28 . The only difference between these two channel balances is the depth of the bottom fitting, or the 'heel-to-toe' measurement. See the diagram below for reference. Measure the depth of your old shoe to figure out which balance you should go with. In either case, for a new stamp option choose 2730. 
Comparison of the S351 and S390 balance shoes.
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Bob from SWISCO responded:
September 26, 2023
They don't make a shoe in that size, unfortunately, but I think it's reasonable to say that you had the larger 1-1/8" sized shoe that just wore down over time. The friction that comes with constant use wears on the nylon so these very likely aren't going to be the same size as they were when brand new. We don't offer warranties, but we do accept returns. You can see our return policy here for more information. |
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Bob from SWISCO responded:
September 29, 2023
Great! I'm glad you verified that. I feel very confident that our Series 390 is the balance you want. I see nothing else about your construction that would invalidate its use in your window. There are a few minor differences but they're just a matter of your balance being older. As long as the nylon fittings, length, and stamp all match up then you should be good to go. |
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Bob from SWISCO responded:
October 2, 2023
That's awesome, thank you! We really appreciate the business. Please feel free to reach out if we can be of any further assistance. |
