Roof Vent Hood, Exhaust Airflow @ 0.100 in SP 3, 591 cfm, Hood Height 16 in, Hood Length 48 in, Hood Width 48 in, Cutout Length 25 1/2 in, Cutout Width 25 1/2 in, Housing Material Steel, Assembly Unassembled, Compatible Curb Grainger Part Number 2ZV83, 3AZH7, 4C454, Compatible Damper Grainger Part Number 2FTV7, Mount Type Roof Curb, Number of Filters 0. This item has been restricted from sale in the following state (s): []