Brand: NITRA Item: Tubing Operating Temperature: -454 to +500 deg F Material: PTFE Color: Natural Inside Diameter: 5/32in (4mm) Outside Diameter: 1/4in Operating Pressure: 275 psi Working Fluid: Air or inert gas Working Length: 100ft package NITRA pneumatic tubing, PTFE, natural, 1/4in outside diameter, 5/32in (4mm) inside diameter, 100ft package.