Square Sunk Watertight Hatch Cover is a sort of watertight hatch cover and it is embedded. Weight light, excellent water tightness and being flexible to open and close are the advantages of this cover. There are two types of sunk watertight hatch cover: square and elliptic. Products can be customized according to your requirements. It is used to the main passage way of various ship cabins or where it is needed to keep flush with the deck. The products are identified by the standard of CB958-80 and ISO5778-79. Please contact us for detail information if you are interested in our products.