3/8"ID x 9/16" OD x 100', Plumb Craft, clear tubing, non-toxic FDA, can be used for flexible lines for low pressure air, water, liquids, beverages, chemicals & gases as well as drain lines for air conditioners & dehumidifiers, temperature range 25 to 150 degrees Fahrenheit, working pressure 25 psi at 70 degrees Fahrenheit, tubing is marked every foot for easy measuring & cutting, dispenser box.