Red, food-grade PVC tubing is ideal for air supply lines in draft beer, soda and other beverage systems. Low density PVC tubing offers the best combination of low taste and odor transfer and resistance to stress cracking. Specifications: Inside Diameter: 5/16in (8mm) Outside Diameter: 9/16in (14mm) Maximum Working Pressure at 70F: 60PSI Maximum Working Pressure at 122F: 20PSI Wall Thickness: 1/8in (3mm) Model: Bevlex Series 204