Need help buying correct balance, Thank you!

A home owner from California says:
Window Master window (7/2002) single hung balances 14" x 1/2" with 1330 stamp on balance
Thumbnail of the uploaded file named 516C13C8-FBDB-4298-959D-963E04D32713.jpeg
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Emily from SWISCO responded:

Thanks for reaching out to us! Based on this photo, I would recommend our S380-14 or S385-14 channel balance. The best replacement will depend on the depth of the bottom fitting so you would need to measure as shown below. You will also need the 1330 spring strength option. 

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

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