1Pack Dayton 1C211 48 in Backdraft Damper / Wall Shutter 48-1/2 in x 48-1/2 in

1Pack Dayton 1C211 48 in Backdraft Damper / Wall Shutter 48-1/2 in x 48-1/2 in Keep your commercial or industrial workplace safe and comfortable with this Backdraft Damper/Wall Shutter. The shutter is specifically designed for use with vertical mounted exhaust fans and will help provide maximum ventilation in your work area. The shutter blade is constructed of mill finished aluminum and has a shutter mounting location that is on the wall. It has a prepunched mounting hole size and has a frame depth of 3 inches. It also has a fan diameter size that is 48 inches. Each shutter panel measures 48-1/2 inches x 48-1/2 inches.