Coil Balance Series?

Handy Person from USA

Jan 10, 2026 5:29 pm

Not sure what Series coil balance I have? See photo attached.
It has 4.5 35" printed on the end of it but no other numbers are visible.
Thanks
Aran

1 user uploaded image

6 Replies

Bob from SWISCO

Jan 11, 2026 4:22 pm

Hello there. Is the spring 1/2" wide? If so I suspect it's the S160-04 4.5 pound spring. To be safe, show me the pivot shoe the spring attaches to, as that will narrow things down further.

Handy Person from USA

Jan 26, 2026 7:15 am

Apologies for the dealy in responding. Yes it is 1/2" wide. See photo attached of the pivot shoe.

Aran

1 user uploaded image

Bob from SWISCO

Jan 27, 2026 3:13 pm

Hey Aran. Great, thanks. This is the !60-04 4.5 pound spring. The pivot shoe, if your old one is damaged, is the 15-111. Let us know if you have further questions!

Handy Person from USA

Jan 27, 2026 3:52 pm

Thanks Bob. Is the 15-191 ( https://www.swisco.com/Heavy-Duty-Pivot-Lock-Shoe/pd/Tilt-Window-Replacement-Pivot-Lock-Shoes/15-191) a heavier duty alternative pivot shoe to the 15-111?
Aran

Bob from SWISCO

Jan 28, 2026 3:12 pm

Yes, the 15-191 is a heavy duty version of the 15-111 shoe. We typically recommend it for heavier sashes. Let us know if you have further questions.