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. "Y" ADAPTERS have MarineGuard II cover. Female Connector: 2-30A 125V Locking w/ Sealing Collar System, attaches to cordset or boat inlet * Male Connector: 30A 125V Locking, attaches to dockside receptacle or cordset * Equipped with covers and sealing collars, for use in wet locations