Attwood 1364A, Cowl Ventilator, 6-Inch, ChromeCondition:* New Surplus Stock, No OEM Packaging. As Pictured.Additional Notes:* Can be used with any standard 3″ ventilation hose.* Features flexible hose flange that is screwed onto hose, then snaps onto the flange.* The neck extends 1″ below deck* Chrome-plated zinc.* Flange is non-corrosive plastic.* Installs with #8 screws.* Dimensions (WxLxH) 5-5/16″ x 6″ x 2-1/4″* Installation Hole Size 3-1/4″ To 3-1/2″Attwood 1364A