MARINCO ADAPTERS are thoroughly tested and inspected to insure highest quality. Dialectric and continuity tests are run before and after molding on each adapter. All products are visually inspected prior to shipment. Designed specifically for marine use. Highest grade materials. Rugged durability. Safe, efficient use. All wire is UL listed and oil and moisture resistant. Wire gauge is selected according to device rating. Molded portions are yellow vinyl wire jacketing compound. ADAPTERS are equipped with covers. For use in wet locations. All, except 105A, have a unique sealing collar system that joins adapter to cordset with a positive, mechanical connection which provides maximum moisture protection. Covers, where indicated, are MarineGuard II. Female Connector: 30A, 125V with Locking Cover. Male Plug: 50A, 125V with Locking Cover.