What channel balance type I have to buy?

A quick learner from Seattle WA says:
October 14, 2019
I just took off channel balance from my 40 years plus front slide window of my living room . Can't identify exactly what serie to buy. Length metal to metal 33 inches, width 1/2 in. Thank you.
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Paul from SWISCO responded:
October 18, 2019

Thank you for your patience with us while we wrap up this busy season. Your balance closely resembles both our S380-33 and S385-33. The only difference between these two parts is the depth measurement of the bottom balance shoe. The depth measurement of the bottom shoe for the Series 380 is 1" and for the Series 385 is 1-3/32". Measure the depth of your bottom shoe, like in the diagram below, to determine which balance would make the better match. Whichever one chosen will go with the 3260 option.

Alternate view of 15-004
Alternate view of 15-004
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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