YaeMarine Marine Boat Deck Access Hatch & Lid Boat Marine Caravan RV Features: Heavy Duty. Made of Non-Corrosion UV stabilized ABS plastic, could bear serious marine environment; Protrusion above deck: 0.7" (17mm) ;Intrusion below deck: 1" (26mm) ; Mounting screws not included, Multiple size options; Low profile hatch, designed for installation on internal or external flat surface; Rubber seal ensures weatherproofing when mounted on vertical surfaces; The lid hinges 180° and completely covers the mounting flange, for an attractive flush finish; Strong recessed handles. Easy to install, pre-drilled countersunk fastening holes (screws not included).