Extremely durable, high temperature EPDM synthetic rubber liner tube and cover (ethylene propylene diene monomer) 2-ply fabric reinforced for A/C, engine cooling, sanitation, as well as other boat and plant pressurized applications - both water and air delivery Resistant to coolants, heat & cold, ozone, saltwater Rated to 200 psi (1.38 Mpa) Temperature rated to +212F (100C) Exceeds SAE J20R3 Black with white letters 2-year warranty