Abbott Rubber 1/4" IDx7/16" ODx50' Black Non-Reinforced Vacuum Tubing. This small diameter thermoplastic compound is suitable for a variety of uses, including vacuum applications and low pressure water lines. It is not for under hood applications. Weather resistant and with a temperature range of 25 to 150 degrees Fahrenheit, it has a working pressure of 40 PSI at 70 degrees Fahrenheit. Comes in a dispenser box.