APPLICATIONS: Cowl Vent with Snap-on Deck and cover designed for air intake or cabin ventilation. Great for bilge ventilation with or without a blower SNAP-ON DECK PLATE: Includes snap-on deck plate and cover for use in rough weather. Cowl ventilators can revolve and are removable MEASUREMENTS: Airflow Size: 3" (76mm). Deck Plate Cut Out: 3-1/2" (89mm). Deck Plate Outer Diameter: 5" (127mm). Height: 4" (102mm). 6 #8 fasteners (not included) MARINE-GRADE MATERIALS: Made from durable, flexible, UV resistant dip molded White PVC with a Traditional red interior SAFETY: PVC Cowl Vent is safer than metal or other types of rigid vents FIVE OCEANS, 40 Years developing High-Quality Marine & Outdoor Products APPLICATIONS: Cowl Vent with Snap-on Deck and cover designed for air intake or cabin ventilation. Great for bilge ventilation with or without a blower. SNAP-ON DECK PLATE: Includes snap-on deck plate and cover for use in rough weather. Cowl ventilators can revolve and are removable. MEASUREMENTS: Airflow Size: 3" (76mm). Deck Plate Cut Out: 3-1/2" (89mm). Deck Plate Outer Diameter: 5" (127mm). Height: 4" (102mm). 6 #8 fasteners (not included). MARINE-GRADE MATERIALS: Made from durable, flexible, UV resistant dip molded White PVC with a Traditional red interior. SAFETY: PVC Cowl Vent is safer than metal or other types of rigid vents. PRODUCT NUMBER: FO-88-M2