Vetus Altus 2626 Ventilation Hatch, aluminum profile only 21mm high. Hatch is designed for ocean use and can be fitted on deck. Hatch is provided with carefully designed hatch adjusters which are both stylish and easy to operate. They allow the lid to be held open at any angle through ninety degrees. Can be opened from inside or outside the boat or can be locked, either completely watertight or in a ventilation position. The frame profile is satin sheen anodixed and it recesses 22mm below the deck surface. The acrylic has a thickness of 10 mm and the color is "Dark Smoke". External dimension 334 mm x 334 mm.