I need to order two new balance springs for an older window. The only marking on them is "26 4 Bsi"
Thank you!
Help-Balance Springs 26 4 Bsi
Quick Learner
Jan 16, 2026 10:42 am
5 user uploaded images
2 Replies
Jasmine from SWISCO
Jan 16, 2026 3:33 pm
Thanks for your post! These are Extended-Travel Channel Balance. These are custom assemblies, so I've forwarded a quote to your email for you to place the order.
Please let me know if you have any questions.