Bev-Seal Ultra® Series 235 Poly Tubing - 3/8" ID x 100 ft. SpoolBev Seal Ultra Series 235 is the industrial gold standard for flavor neutral beverage distribution. This 3 8" ID tubing features a specialized copolyester inner liner that acts as a 100% flavor barrier, ensuring zero "plastic" off flavors in your beer, wine, or soda. It is exceptionally resistant to chemicals, stress cracking, and O2 ingress. The 3 8" ID allows for high flow rates over medium to long runs in commercial draft systems and water supply