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.
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)