I am looking for replacments for 4 differnent parts. All have the same type fittings. I have included photos of the side and underside views of the bottom and top nylon fittings
Part #1. Stamped 33 3, channel measurment = 34"
Part #2. Stamped 27 5, channel measurement = 28"
Part #3. Stamped 27 3, channel measurement = 28"
Part #4. Stamped 15 4, channel measurment = 16"
Single Hung Window - Spring Balance Replacements

Quick Learner from San Diego, CA
Jan 31, 2025 2:24 pm
5 user uploaded images
4 Replies

Casey from SWISCO
Jan 31, 2025 3:51 pm


Hello,
With this combination of attachments, you could have either the S380 or S385 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 to choose the spring strength options that correspond to the stamp codes shown in your last photo. Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.

Quick Learner from San Diego, CA
Jan 31, 2025 10:24 pm
I just ordered Series 385 parts as the bottom attachment measures 1 3/32". Thank you very much, Casey, for your clear and quick reply.
- Joe
- Joe

Casey from SWISCO
Feb 3, 2025 8:09 am


That's great! We're happy to help and appreciate your business.
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