20 in Backdraft Damper / Wall Shutter, 22-1/2 in x 22-1/2 in DESCRIPTION_UPDATE Features Left Handed graingerSKU: 52TF67

Features Left Handed graingerSKU: 52TF67

zoro_no: G5214651

zoro_no: G9771898

Material Aluminum Bronze graingerSKU: 21XV70

20 in Backdraft Damper / Wall Shutter, 22-1/2 in x 22-1/2 in DESCRIPTION_UPDATE Features Left Handed graingerSKU: 52TF6725 In. H W 6 In. L Aluminum Backdraft Damper, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height 25 in, Rough Opening Diameter 22 1 2 in, Rough Opening Shape Square, Fits Fan Diameter 20 in, For Duct Shape Not Applicable, Free Area 2. 5 sq ft, Overall Width 25 in, Frame Material Thickness 20 ga, Overall Length 6 in, Connection Type