Designed for compressed air applications. Rubber/PVC blend construction offers the best of both material, lightweight than rubber air hose, more flexible than PVC. Anti-UV, keep the color unchanged in the sun for a long time. TESTED TOUGH – The hose has been tested rigorously to confirm burst strength, Anti- ozone & anti-ultraviolet, so it can reach 3 year warranty. Double Brass 1/4" MNPT Fittings, MAX working pressure 300psi.