Acrylic body, polymethylpentene tip, TFE stopcock and plug made with Teflon* Resin. Used to dispense known amounts of liquid in an experiment. Crystal-clear; levels of colorless liquids are easily read. Durable. Individually calibrated to meet the accuracy requirements of ASTM E287. Stopcock is leakproof, with self-lubricating plug. Excellent for general use, schools, industrial labs and field use. Unaffected by dilute mineral acids and bases except hydrofluoric acid and ammonium hydroxide. The pH range of 1-14 is ideal and up to 5% wt/wt of acids or 30% bases can be used. Not designed for exposure to alcohol and organic solvents. *Teflon is a registered trademark of E.I. du Pont de Nemours and Company.