Master Plumber, 1/4" ID x 3/8" OD x 100", Low Density Polyethylene Tube, Made From Non-Toxic, Odorless, Tasteless Ingredients Meeting FDA Requirements, Used In Laboratories, Hospitals & Ideal Tubing For Large OEM Machines, Chemical Lines, Air Lines, Wire Jacketing & Food & Beverage Uses, 125 Working Pressure @ 70°ree. Fahrenheit, Patented Open Box Spool.