Master Plumber, 5/16" ID x 7/16" OD x 100', Clear, PVC Tubing, Manufactured With Non-Toxic FDA Compounds, Can Be Used For Flexible Lines For Low Pressure Air, Water, Liquids, Beverages, Chemicals & Gases As Well As Drain Lines For Air Conditioners & Dehumidifiers, Excellent Resistance To Mild Acids & Chemicals, See Through Design Allows For Visual Flow, Not For Use With Ice Makers Or Petroleum Based Products, For Use With Hose Barbs & Clamps, Temperature Range 25 To 150 Degrees Fahrenheit, Working Pressure 50 PSI At 70 Degrees Fahrenheit, Tubing Is Marked Every Foot For Easy Measuring & Cutting, Dispenser Box.