Ensure your semi truck is Ready for the Road Ahead with a visible display of hazardous contents, with the LabelMaster 13.5 " x 13.5 " Combustible / Inhalation Hazard Aluminum Frame. Thanks to its wide variety of signs, this replacement placard allows vehicles to meet DOT requirements by indicating when they are carrying dangerous or hazmat materials. Crafted with durable and weather-resistant materials to deliver year-round reliability. FleetPride is your First Click in Heavy Duty .