This series 751 ribbed channel balance also known as a block and tackle balance has a 21" long metal ribbed channel and is for a tilt window. This balance comes fully assembled with a 15-014 shoe. The channel width measures 9/16" but is considered 1/2" in the trade.
|Stamp Option ||Sash Weight Range|
|20R ||10 to 17 lbs |
|20HD ||17 to 20 lbs |
|20TG ||20 to 30 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.