This Full Frame Spacemaster System includes 8 placard panels in a single frame: Dangerous Flammable Gas 2 Poison 6 Corrosive 8 Flammable Liquid 3 Oxidizer 5.1 Radioactive 7 Non-Flammable Gas 2 Blank Placards meet DOT specifications for transporting hazardous materials. Changing DOT placards when your load changes is as easy as the flip of a panel. Spacemaster eliminates the hassle and expense of replacing placards, so DOT compliance is virtually at your fingertips. Spacemaster frames are constructed of corrosion-resistant, fully formed rigid aluminum that provides superior durability, even under the toughest road conditions. Self-contained placard panels are constructed of aluminum alloy and mill rollercoated with white acrylic paint. Panels lock in place with 4 double-riveted stainless steel pressure fasteners. Legends are silkscreened with UV inks to retard fading, chipping or peeling. Spacemaster Full Frame, 8-Legend Flip Placard System for Trailers is sold per each.