Chemware* Teflon* PFA Septum Vials with Polyethylene Tray

Stores corrosives, acids, solvents, reagents and stains. Handy tray holds 10 vials. Extra sturdy construction for long life. Vials have threaded lids with 1/4 in. opening. Septum is Teflon*/silicone laminate and reseals itself after puncture via syringe. The absence of active sites on the chemically-inert surface reduces the likelihood of adsorption of metals or polar compounds from solutions. Ideal for trace metal analysis. Use in applications where glass can alter results. Height is with closure.