5/16" x 1/16" x 275', Non-Reinforced Reel Clear Vinyl Tubing, Flexible, & Lightweight Poly Vinyl Chloride, Provides Full View Of Flowing Product, Great For Sight Gauges On Storage Tanks, FDA Approved, Rated Good To Excellent For Acids, Alkalis & Most Solvents, Maximum PSI 50, Temperature Range -20 Degrees - 150 Degrees, Do Not Use For Ketones, Esters & Some Aromatic Hydrocarbons, Manufacturer Testing For PSI Completed At 68 Degrees, Increase Or Decrease In Temperature May Affect Hose Performance.