Item DescriptionThis basic Spacemaster system includes 2 placard panels in a single frame. Permanent Flip System was designed for bulk transporters of propane and anhydrous ammonia. DOT Placard System contains the following placard panels imprinted with UN numbers for use on dedicated equipment: 1005 (Non-Flammable Gas) 1075 (Flammable Gas) Blank Placard panels are made of aluminum alloy and mill roller coated with white acrylic paint. Legends are silkscreened with UV inks to retard fading, chipping or peeling. Standard brite mill finish, Spacemaster frame is constructed of corrosion-resistant, fully formed rigid aluminum. Placard panels lock in place with four stainless steel pressure fasteners. Permanent Flip Placard System for bulk transporters of propane and anhydrous ammonia is sold per each.