Construction: It is composed of an inner rubber protection layer, middle rubber layer, steel wire spiral layer and external rubber cover. Applications: Steel wire spiral drilling rubber hoses are used in oil fields, well cementing, well repairing, geological explorations, small drilling machine, and water conveyance at coal excavations. They are useful to carry slurry, water at environmental temperature, and other fluids. Working Temperature: From -40up to +100 Executive Standard: GB10544-2003, API Spec 7K, SY 5469. if you are interested in them ,trouble you to cantact us