Channel sash balance with plug

A home owner from Los Angeles says:
I pulled the channel balance device out of my peach tree double hung non tilt windows. The channel has a number 3648 on it. The metal channel measures 20.25 inches by 1/2 inch. It has a plug on one end that inserts into the window frame with one screw securing it. I was going to tackle one window and if I'm successful I have a number of these windows same dimensions in my house. Do you have the complete assembly to replace this. I'll see if I can attach a photo.
Thumbnail of the uploaded file named image.jpg
Profile picture of Bob
Bob from SWISCO responded:

See our S745-20 Peachtree Balance. To know what stamp option to select, get the exact weight of your window sash. You can then match that exact weight with one of the weight ranges listed alongside either stamp option on the balance product page.

How to Identify Replacement Channel Balances
How to Identify Replacement Channel Balances
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 4-7 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