Master Plumber, 5/16" ID x 7/16" OD x 100", Clear, Vinyl PVC Tubing, Can Be Used For Beverage Dispensing, Potable Water, Laboratory Tubing, Drain Lines, Water Transfer & Numerous Low Pressure Applications, In Compliance With FDA CFR Title 21 Requirements & Meets USDA, 3A & NSF51 Criteria, 50 Working Pressure @ 70°ree. Fahrenheit, Patented Open Box Spools.