Get your semi truck Ready for the Road Ahead with reliable safety lighting, with the Truck-Lite 6" 16-Gauge GPT Wire Marker / Clearance Plug. This replacement plug features a right-angle design that allows for easy installation, and tin-plated brass terminals to ensure a secure connection. Each plug is 100% compliant with SAE, DOT, and NFPA regulations, making it a safe and reliable choice for all types of conditions. FleetPride is your First Click in Heavy Duty .