This series 377 channel balance also known as a block and tackle balance has a 12" long metal channel and is for a non-tilt window. The channel's width measures 9/16" but is considered 1/2" in the trade. This balance comes fully assembled with a 15-005 shoe and a 19-018 top attached.
|Stamp Option ||Sash Weight Range|
|1110 ||3 to 6 lb |
|1120 ||6 to 9 lb |
|1130 ||9 to 11 lb |
|1140 ||11 to 12 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.