Replacement WIndow Balance - Thermo Tech Window

A handy person from St. Cloud, MN says:
Need to replace 7 balances. Attached pictures of the top and bottom attachments along with the stamp on the slide "2590 33". Slide is 26 inches end to end without attachments. Can you tell us what replacement part # we should be ordering?
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
I recommend our S390-26 channel balance, based on your picture. I'm not as sure about the stamp, though. You should weigh your sash and compare it to the chart found on the S390-26 store page to confirm what would work best.
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.