Made of the highest quality marine-grade components including corrosion resistant, nickel plated contacts. Marinco cordsets contain heavy duty, super flexible marine-grade cable along with watertight molded plugs and connectors. The boatside connector features a molded-in LED light for visual power indication. Watertight molded plug and connector for safety and durability Heavy duty, super flexible marine grade cable (30 amp 10 gauge, 50 amp 6 gauge) All models include a standard threaded ring for hook-up to ordinary threaded inlets Power Indicator Light: Boatside connector features a molded-in LED light. When it glows red, you know you have power to the boat Contour Grip with Thumbprint Locator: Both plug and connector ends are molded to fit the contour of your hand. When the thumbprint is in the 12 o���clock position, the blades line up for easy connection.