ISO 1403:1995. EPDM = Ethylene Propylene Diene Monomer (outer and inner). Air and Water Hose 3304. Extremely flexible grey universal hose， suitable for hot and cold water， compressed air and certain chemicals (resistant to acetates and ketones). The outer rubber coating ensures excellent resistance to ozone. Air and water hose Ester reinforced Excellent ozone resistance Grey outer， black inner Anti-static
