Help identifying correct replacement balance

A quick learner from Virginia says:
March 31, 2017
Can not tell from the pictures on your site which balance I need part S380 or S385. My original part has the stamp 32 4 AN Caldwell. Thank you for your help.
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
April 5, 2017
I'm afraid I can't tell which Series is best. The only difference between the Series 380 and Series 385 is the bottom shoe, specifically the depth, or "heel-to-toe" measurement. You will need to measure yours and refer to our dimensions to confirm the better match.
33" Series 380 Channel Balance
33" Series 380 Channel Balance
S380-33
$11.52
33" Series 385 Channel Balance
33" Series 385 Channel Balance
S385-33
$11.52
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