Marinco EEL Pigtail Shore Power Adapter 30A Dock to 50A Boat The Marinco EEL Pigtail Shore Power Adapter 30A Dock to 50A Boat allows you to connect from one dockside receptacle to one boatside inlet or equipment. This adapter is fully molded and equipped with Marincos unique sealing collar and covers for use in wet locations. The Easily Engaged Lock is a patented, industry-first, jaw-clamp design that provides one-handed operation and a secure waterproof seal. This eliminates the use for a locki