Channel Balance replacements for my home.

A quick learner from El Cajon, California says:
I am looking to replace my 24 inch channel balances in different parts of my home. Photos included. The measurement, metal to metal end is 24 inches, but the markings may indicate 23. Is there a bulk price if I buy many and replace them throughout my house?
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Jasmine from SWISCO responded:

Thanks for reaching out! Your balances are either the S380-24 with a 1" shoe or the S385-24 with a 1-3/32" shoe; these balances have a 24" length. You'll need to select the 2340 stamp.

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. Although, 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.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.

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