The OAT antifreeze coolant hoses for EURO 6 Engines are specially compounded and designed to resist the chemical effect of OAT coolants either blended with regular ethylene glycol or diluted. Our OAT coolant hose have been tested under prescribed by SAE J20 Class A standard using an OAT coolant diluted in water (50 Vol.-% coolant, 50 Vol.-% water).