Series 770 replacement 17" block and tackle channel balance system for a tilt window. Sold individually.
Sash Weight Range
3 to 7 lbs
7 to 10 lbs
10 to 16 lbs
16 to 19 lbs
19 to 22 lbs
*This information is based on 2 balances per sash. Balances are designed
assuming friction in the jamb weather-strip will carry a portion of the sash
weight. Suggested sash weights are approximate.
Balances are sold individually, however, it is a good idea to replace both window balances at the same time. Pairing a new balance with an old one would cause the new balance to wear out faster.
The stamp option represents the strength of the channel balance. Locate the stamp on your channel balance. If your stamp does not match any of the stamp options available or you are unsure of which stamp option you should choose: ask our experts for help.