Deck Hatches (White)Made to the same standards as the MHG305 MHG310, but for horizontal mounting as hatches. All are fitted with airsprings, very sturdy locking handles and sealing gaskets that have no joins. Another feature of these units is that when the hatch is closed (i. e. 90% of the time), the mounting screws are covered by the hatch itself. This helps prevent the screw from being a source of a water leak. Thoughtful.