Sierra Heavy Duty Polyester Reinforced PVC Tubing 50'Sierra Shields Heavy-Duty Polyester Reinforced PVC Tubing has a clear extra heavy wall FDA formula vinyl. The reinforced tube has superior kink resistance and a polyester braid reinforcement.Specifications: I.D.: 1/2" or 12.7mm; O.D.: 3/4" or 19.1mm; Burst Pressure: 600#; Wt. "C": 13.5; Application: Primarily used for pressurized water system supply (hot or cold); Also, used for wash down pump connections and head intake;