Two Layer Construction Designed for heavy duty water discharge applications in agriculture, construction, industry, and mining. Abrasion resistant PVC cover, and PVC tube provide long service life. Rolls up flat for easy storage. The working pressure ratings are based on ambient temperature of 70° F and will vary inversely with temperature changes. At 120° F the working pressure will be reduced to 40% of the working pressure at 70°F Safety Factor 3:1 Temperature range : -10 to 150° F Construction : Cover : Yellow PVC Tube : Black PVC Reinforcement : Two spiral plies, one longitudinal ply. Fire Resistant MSHA 2G-60/1