How to determine length of missing balance

A quick learner from San Diego says:
June 1, 2015
I need to buy new channel balances for a window, but both of the old ones are gone. I looked at the balances on the other windows in the house and they are Series 385. I weighed the sash and it is 16 lbs. Trying to figure out the length and model # I need to order. I measured the sash height and it is 20.5" tall. Is this enough to go off to find the correct replacement?

Thanks!
Profile picture of Tom
Tom from SWISCO responded:
June 2, 2015
Thanks for posting. I think we can help you find the right length. Rather than the total height of the sash, can you instead give me the height of the visible glass? We find that to be a better gauge of what size balance you need. Thanks!
A quick learner from San Diego says:
June 4, 2015
Thanks, Tom. The visible glass is 17" tall.
Profile picture of Paul
Paul from SWISCO responded:
June 5, 2015
Hello! For 17" tall glass, I recommend our S385-19 channel balance. I would also recommend the 1840 stamp option for your 16 pound sash.
19" Series 385 Channel Balance
19" Series 385 Channel Balance
S385-19
$9.34
How to Replace a Non-Tilt Channel Balance
How to Replace a Non-Tilt Channel Balance
VIDEO
WATCH >
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to Identify Replacement Channel Balances
How to Identify Replacement Channel Balances
VIDEO
WATCH >
How to replace a non-tilt channel balance
How to replace a non-tilt channel balance
GUIDE
READ >
Choosing a Non-tilt Channel Balance: What Will We Need?
Choosing a Non-tilt Channel Balance: What Will We Need?
GUIDE
READ >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.