channel replacement identify part

A quick learner from Mountain View says:
March 21, 2017
Dear Swisco customer support,

I am attaching the pictures of channels from another window and the dimensions of window sash in a diagram.

Channel replacement length = 28 inches
Channel replacement width = little more than 1/2 inch
Weight of one window sash = 30lb
Non tilted window

No markings on the channel replacement

User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
March 27, 2017
Thanks for posting. Your post is a little unclear. Just to confirm, you're saying that the window in question is missing its balances, so you're using these balances from a different window as a reference. Are the two windows identical? If not, what is the visible glass size of the window that uses the 28" balance?

In the meantime, this looks like our Series 350 channel balance. I just want to clear up what length you'll need.
A quick learner from Mountain view, CA says:
March 27, 2017
I need the channel balancer for the following.

glass height - 27.5
glass height - including borders - 28.75
Non tilt window
sash weight - 30lb

Profile picture of Paul
Paul from SWISCO responded:
March 31, 2017
Thanks again for your patience. Based on this information, I would recommend an S350-28 with a 2750 stamp option.
28" Series 350 Channel Balance
28" Series 350 Channel Balance
S350-28
$10.97
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.