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). Installation, allowing for quick sash insertion or removal. The 22" channel length can be identified through id stamps including 21-50, 21-5, and 21-e. Part# 17b21-50.
Number. 50413296