window balance replacement

A handy person from naples fl says:
July 27, 2020
I'm ordering some non-tilt window balance replacements. I have a question before ordering, what is the difference between the s380 and the s385 series? I know mine is 29" block & tackle balance. my problem is I can't accurately ID the ends or guides. The only marking I see on my original balances are 29A. Any help is greatly appreciated. Thanks Todd
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Bob from SWISCO responded:
July 30, 2020

The difference between the Series 380 and Series 385 is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. The image below shows the difference. The Series 380 has a shoe depth of 1", while the Series 385 shoe is 1-3/32" deep.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
A handy person from naples fl says:
July 30, 2020
Thank you, S380 it is. Perfect. Thanks again
29" Series 380 Channel Balance
29" Series 380 Channel Balance
S380-29
$11.10
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