This heavy-duty 7-way replacement plug is designed for semi-trucks, tractors, and trailers. Featuring a round 7-pin connector, it allows you to connect your trailer's lighting system, brakes, and auxiliary circuits seamlessly. The extension spring guard provides added protection against accidental disconnection, ensuring a secure and reliable connection. Made with durable materials, this plug adapter is built to withstand the rigors of long-haul trucking and harsh weather conditions. Whether you're hauling cargo across the country or navigating through city streets, this 7-way plug ensures your trailer's electrical system functions properly, enhancing safety and compliance with regulations. With its rugged construction and easy installation, this replacement plug is a must-have accessory for any semi-truck or tractor-trailer owner.