Computer controlled manufacturing process virtually ensures product uniformity. This product is comprised of superior EPDM rubber which resists damaging effects of ozone and heat, plus harmful grease and oil common to air brake systems. Its four spiral construction meets SAE J1402 specifications. Complies with DOT FMVSS 106 requirements. The hose is flexible, kink resistant and is designed to accept all styles of air brake couplings, including conventional brass and plastic couplings. The temperature range is -40 degrees F to +212 degrees F   ( -40 degrees C to +100 degrees C).