Class 4 Spontaneously Combustible hazardous materials must have identification while in transit, due to their highly dangerous effects if not handled in a proper manner. We provide a one stop shop for your Class 4 Spontaneously Combustible hazardous materials placards. For your convenience, you can choose between two placard types: heavyweight polycoated tagboard that is water resistant or durable self-adhesive vinyl placards. The tagboard fits perfect in placard holders and can be switched out for other placards if need be. As well, the self-adhesive placards strongly stick on your shipment container surface, and are easily removable. Our Class 4 Spontaneously Combustible placards are competitively priced, and give you a reliable option for identifying hazardous materials shipments without sacrificing quality or effectiveness.