Designed for sideload sash applications, suitable for both residential and commercial windows. This balance is aama verified with a class 2 rating and complies with the north american fenestration standard (nafs). T offers easy installation, allowing for quick sash insertion or removal. The 21" channel length can be identified through id stamps including 20-20, 20-2, and 20-b. Part# 17b20-20.
Number. 50413260