Replacement Balancer for an Alcan window

Question

Alcan window installed 1991. Window goes up BUT doesn't stay up. Pics enclosed. Original balancer 18" long.
1/2" wide.

A customer submitted photo of channel balance attachments.

Paul · Accepted Answer

Thanks for posting! Based on your images, it looks like you may have something similar to our S380-18. Do you think that would work for you? If you'd like us to help you identify what option you need, as well, please let me know what the stamp printed on your channel reads.