Roof Vent Hood, Exhaust Airflow @ 0.100 in SP 7, 251 cfm, Hood Height 16 in, Hood Length 68 in, Hood Width 60 in, Cutout Length 37 1/2 in, Cutout Width 37 1/2 in, Housing Material Steel, Assembly Unassembled, Compatible Curb Grainger Part Number 2ZV84, 3AZJ2, 4C455, Compatible Damper Grainger Part Number 3HHN1, Mount Type Roof Curb, Number of Filters 0. This item has been restricted from sale in the following state (s): []