This tubing meets the standards for NSF 51, 61, has a length of 100 feet, a maximum operating pressure of 180 psi and is designed for the following applications: air, water. It is black, has an operating temperature of -68 Degrees F to 160 Degrees F and is resistant to abrasion, wear and is made of polyurethane. In addition, it has ¼ inch outside diameter, 5/32 inch inside diameter, with an inch system of measurement, with 0.05 inch wall thickness, and Shore A 98 hardness.