Need springs

A contractor from Denver says:
April 9, 2022
The numbers are worn off these balance springs it's a small bathroom window the metal rail of the spring measures 15 in not including the plastic parts on each end so what part number do you think I would be safe with thanks John
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Tom from SWISCO responded:
April 11, 2022

Thanks for your photos. Based on what I see here, you have either our S380-15 or S385-15, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
15" Series 385 Channel Balance
15" Series 385 Channel Balance
S385-15
$9.34
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