Roof Vent Hood Exhaust Airflow @ 0.100 in SP 17 103 cfm Hood Height 25 in Hood Length 96 in Hood Width 96 in Cutout Length 57 1/2 in Cutout Width 57 1/2 in Housing Material Steel Assembly Unassembled Compatible Curb Grainger Part Number 3C216 3FLT6 Compatible Damper Grainger Part Number 5NKN7 Mount Type Roof Curb Number of Filters 0