Master Plumber, 3/16" ID x 3/8" OD x 50', Black, Non-Reinforced Vacuum Tubing, Small Diameter Thermoplastic Compound For A Variety Of Uses, Designed For Vacuum Applications & Can Be Used For Low Pressure Water Lines, Not For Under Hood, Applications, Non-Reinforced Thermoplastic Compound, For Use As Windshield Wiper Vacuum Tubing, Weather Resistant, Temperature Range 25 To 150 Degrees Fahrenheit, Working Pressure 50 PSI At 70 Degrees Fahrenheit, Dispenser Box.