This tubing meets the standards for FDA CFR Title 21 177.1520, UL 94 HB, has a length of 100 feet, a maximum operating pressure of 149 psi and is designed for the following applications: air, water. It is clear, has an operating temperature of 35 Degrees F to 220 Degrees F, and is made of polypropylene. In addition, it has ¼ inch outside diameter, 3/16 inch inside diameter, with an inch system of measurement, with 0.04 inch wall thickness, and Rockwell R 60 hardness.