This hose meets the standards for DOT FMVSS 106 AIR BRAKE - A, SAE J1402 A, has a length of 500 feet, a maximum operating pressure of 225 psi @ 70 Degrees F and is black, has an operating temperature of -50.8 Degrees to 212 Degrees F and is made of rubber. In addition, it has ½ inch outside diameter and ½ inch inside diameter. This hose is for use on fluids.