Vent Can Be Fitted To The Acrylic Lens Of Any Lewmar Hatch Or To The Deck, Made From The Same Rugged Composite Used In Many Lewmar Hatch And Winch Parts, Styled To Match The Low And Medium Profile Hatches, Captive Bung To Close The Ventilator – It Cannot Be Lost, Fits Deck Thickness To 100Mm, Tested To Ce Iso 12216 And Leak Tested, No Sealant Required For Hatch Fitting.