Plasticized polyvinyl chloride tubing, Manufactured to exact specifications, PVC has the flexibility of rubber and the clarity of glass, Smooth dense bore maximizes flow and reduces sediment buildup, Handles a wide variety of chemicals, gases, and liquids, Excellent resistance to acids, alkalis, and many solvents, makes superior drainage line and protective insulation, Certified to NSF 61 section 9 Clean Drinking Water standard, 1550 PSI tensile strength, Non-toxic NSF listed material toxicity, 19 to 55 PSI pressure range, -40 degree F brittle point, -175 degree F maximum operating temperature, 9/16 outside diameter, 3/8 inside diameter, 3/32 wall, 100 roll, Clear.