Balance

A handy person from Pinon Hills california says:
2530 stamped on balance. 26in length of metal
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Jasmine from SWISCO responded:

Thanks for writing in! It looks like you have either the S380-26 with a 1" shoe or the S385-26 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.

Let me know if it does not match either measurement. You'll need to select the 2530 stamp for a 15 to 19lb window.

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

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