Channel balance replacement

A quick learner from Long Beach CA. says:
Hi, I'm trying to replace the channel balances for an old Prime Windo product and I wanted to double check the dimensions before I order. Would the S390-14 with the 1350 option be the correct number?
Here are the specs:
14" long
weight 13.2 lbs.
wingless
balance shoe depth 1 1/8"
Thanks!
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Casey from SWISCO responded:

Hello,

I agree that you've figured out the correct replacement for your balance and the spring strength you need to support your window sash. Please let us know if you have any other questions. Thank you!

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