Master Plumber, 1" ID x 1-3/8" OD x 50', Clear, PVC Tubing, Reinforced With Spiral Polyester, For Use In Pressure Applications, Manufactured With Non-Toxic FDA Compounds, Use For Flexible Lines For Air, Water, Liquids, Beverages, & Gases As Well As Drain Lines For Air Conditioners & Dehumidifiers Where Higher Pressure Or Tubing Wall Stability Is Required, 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 125 PSI At 70 Degrees Fahrenheit, Tubing Is Marked Every Foot For Easy Measuring & Cutting, Dispenser Box.