Master Plumber, 5/16 in. ID x 1/2 in. OD x 100 ft., 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, 60 Working Pressure @ 70°ree. Fahrenheit, Patented Open Box Spools.