This series 373 channel balance also known as a block and tackle balance has a 21" 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 15-002 shoe and a 19-025 top attached.
|Stamp Option ||Sash Weight Range|
|2010 ||5 to 8 lb |
|2020 ||8 to 12 lb |
|2030 ||12 to 15 lb |
|2040 ||15 to 23 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.