Windows balace 27 inches long from metal to metal and 1/2 inch width with labeled 26 4 EW CMC 4

A home owner says:
Please help me to buy 2 windows balances from your website.
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Jasmine from SWISCO responded:

Hey there! It looks like you have either the S380-27 or the S385-27 with a 2640 stamp.

To determine which series you have, you'll need to confirm the depth of your bottom shoe. If it does not match either of the measurements below, please let me know.

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

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