Prepare your semi truck to be Ready for the Road Ahead , with the LabelMaster 13.5" x 13.5" 17-Legend Aluminum Flip Split Frame Placard that acts as a visible display of hazardous contents. To meet DOT requirements, this replacement placard allows vehicles to indicate when they are carrying dangerous or hazmat materials. Fashioned with durable and weather-resistant materials for year-round reliability. FleetPride is your First Click in Heavy Duty .