The gasket (body) is fixed to the hull of the boat and theA.538 O ringis placed around the gasket, under the small lip. The hatch cover lid is then screwed tight onto the gasket and forms a seal with the O ring around the external diameter of the hatch.
Available in three colors and with or without a hatch bag.
This hatch cover requiresO ring A.538to be installed for complete water tightness.