Plasticized polyvinyl chloride manufactured to exact specifications from virgin FDA listed material. Offers the flexibility of rubber and clarity of glass. Smooth dense bore maximizes flow and reduces sediment build-up. Handles a wide variety of chemicals, gases and liquids. Excellent resistance to acids, alkalis and many solvents, use for drainage line and protective insulation. Listed by NSF, Standard 50, 51, 61. Shore A, Durometer, 83+/-3. 1,550 PSI tensile strength. Non-toxic FDA Listed Material. Pressure range 19 to 80 PSI. -40 degrees Fahrenheit brittle point; +175 degrees max operating temperature.