1/8” ID x 5/16” OD Master Plumber Black Non-Reinforced Vacuum Tubing. Small diameter thermoplastic compound for a variety of uses. Designed for vacuum applications but can be used for low pressure water lines. Not for underhood applications. Non-Reinforced Thermoplastic Compound, Black Color, Suitable for use as windshield wiper vacuum tubing, Weather resistant, Not for Under Hood Application, Temperature Range 25 to 150 degrees Fahrenheit, Working pressure 60psi at 70 degrees Fahrenheit. Master Plumber Dispenser Box Carton contains 50 feet of tubing. Made in North America.