Need to replace sssh balances

Handy Person from Florida

Mar 17, 2026 11:12 am

The stamp reads 28c and the metal rail is 28” long. I expect the c is a weight rating. I'm in Florida so the plastic parts are becoming brittle and breaking. I unfortunately ordered the wrong ones so returning those. Thanks for your help.

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7 Replies

Handy Person from Florida

Mar 18, 2026 6:53 am

Actual length is 29"

Do you have the correct ballances for my windows? and what load rating do I need?

Casey from SWISCO

Mar 20, 2026 3:51 pm

Hello,

With this combination of attachments, you could have either the S378-29, S380-29, or S385-29 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You'll also need 2830 spring strength options for your replacement balances. Thank you, and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.

Handy Person from Florida

Mar 21, 2026 8:30 am

Mine measure a little under 1" more like 15/16" should I go with the 1" S380?? Thanks

Casey from SWISCO

Mar 23, 2026 8:43 am

If the shoe is over 7/8" deep, I agree that you most likely have the S380 since the fittings can wear down a bit over time. You could also check another identical balance to confirm the depth.

Handy Person from Florida

Apr 1, 2026 4:47 pm

I have another question: I have a second set that has same end pieces, but the length of the metal chanel is 23" and it is stamped with 22F, a much stronger spring. What do I need to order? Thanks!

Casey from SWISCO

Apr 2, 2026 8:22 am

If the specifications match the S380-23, you would most likely need 2260 strength options based on your stamp code. To confirm, you can weigh the sash to ensure it falls within the 27-30 pound weight range supported by the S380-23 (2260) balances.