PGT Single Hung Window Balance

A quick learner from Palm City, FL says:
I want to confirm the part number for replacing the Channel Balance:
1. PGT Window
2. Existing balance is Caldwell 33 5 AO Caldwell
3. Metal portion is 34"
4. Window is 27.5 lbs
5. Uses a series 380 Channel Balance

Thank you
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Tom from SWISCO responded:

Thanks for your photos. Based on what I see here, you have either our S380-34 or S385-34 , 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.

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