This series 810 channel balance also known as a block and tackle balance has a 32" long metal channel and is for a non-tilt window. The channel has a 3/8" width. This balance comes fully assembled with a 15-077 shoe and 19-023 top attached.
|Stamp Option ||Sash Weight Range|
|31A ||4 to 8 lb |
|31B ||8 to 14 lb |
|31C ||14 to 20 lb |
*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.