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). It offers easy installation, allowing for quick sash insertion or removal. The 19" channel length can be identified through id stamps including 18-40, 18-4, and 18-d. Part# 17b18-40.
Number. 50413139