United window and door series 4200 SH/Sl
Quick Learner from Dover PA
Sep 22, 2026 11:19 am
String broke, removed from window casing, ready to install replacement
2 user uploaded images
2 Replies
Casey from SWISCO
Sep 25, 2026 9:31 am
Hello,
It's tough to be sure based on a damaged balance, but the S770-29 (29B) channel balances would be a good place to start. Take a look and compare the specifications to yours. Also, make sure to confirm if the metal channel measures 29" long. Thanks for posting!
Close up view of the Series 770 balance top.
Close up view of the Series 770 balance bottom.
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