Channel Balance ID

A home owner from Fernandina Beach, FL says:
I have a channel balance that needs to be replaced. Before I order a pair, please verify that I am choosing the right one. I believe I need S380-35, option 3440.

34 4 FX CMC 11

My measurements
Channel balance: 35"
Channel width: 1/2"
Foot: 1" front to back
Sash Wt.: 25 lbs.
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
I can't tell if you have a Series 380 for sure. The only way to confirm is making sure the dimensions of your nylon attachments match those that come with the Series 380 channel balance.
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