Need help identifying which series

Quick Learner from United States
Hi there, I need help identifying which series or model this window balance is in order to get a replacement. This is from a non-tilt vinyl window and it is a half inch wide    
 
Please let me know if you need any more information and thanks in advance for the help!

Thanks.  
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Bob
Bob from SWISCO
SWISCO
Expert

Hello there. Please compare tot he S380-15 or S385-15. The only difference between these two channel balances is the shoe depth. See below. For a stamp choose 1460.

Comparison of the S378, S380 and S385 balance shoes.
Comparison of the S378, S380 and S385 balance shoes.

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