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Jasmine from SWISCO responded:
December 13, 2023
Hey there, Thanks for reaching out! Your balances are either the S380-23 with a 1" shoe or the S385-23 with a 1-3/32" shoe. To determine which series is needed for your window, look over the dimensions from the diagram below to confirm the depth of your bottom shoe. Keep in mind, there is a chance that it could measure 7/8". If so, please let me know as these will need to be a custom assembly. For your 22C stamp, you should be able to select the 2230 stamp option. Although, you may want to confirm that your sash weight falls between 12 to 19lbs. 
Comparison of the S380 and S385 balance shoes.
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Jasmine from SWISCO responded:
December 13, 2023
Okay, great! It sounds like you have the S380-23. You'll be able to make your purchase online by adding the item to the cart, using the links provided. In regard to the spiral balances, can you confirm if they are for a tilt window or a non-tilt window? Also, is the a colored tip on the end of the balance? |
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Jasmine from SWISCO responded:
December 14, 2023
Okay, great! That helps to narrow down the possible replacement recommendations a great deal. Your spiral balances are either the 5/8" Series 600 Spiral Balance (which can also read 9/16") or the 3/8" Series 900 Spiral Balance. To determine which series you have, you'll need to confirm the diameter of the tube. The next step would be to confirm the length. Since your balances do not have a colored tip, you'll need to obtain the exact weight of the sash to determine which color option you'll need to purchase. It would also be a good idea to double check the pivot shoe and the pivot bar to see if they'll need to be replaced. If so, I'll need to see a photo of both pieces of hardware removed. |
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Jasmine from SWISCO responded:
December 14, 2023
The balances you have are the S900-30 spiral balances. For your 20lb sash, you can use either the red tip or the green tip option. In regard to the pivot shoe, yours appears to be the 15-045 and the pivot bar looks like it could possibly be the 26-041. Although, you'll need to remove them to confirm the measurements are correct and that they are the right replacements for your repairs. 
Dimensions for 15-045
Alternate image for 26-041
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