This general purpose air and water hose has a maximum operating pressure of 300 psi @ 70 Degrees F and is red, has an operating temperature of -40 Degrees to 212 Degrees F and is made of EPDM. In addition, it has 29.4 mm outside diameter, 19.1 mm inside diameter. This general purpose air and water hose is for use on air, mild chemicals, and water.