Pre-Cleaned VOA Vials 40ml Clear, Open Top w/0.125" PTFE/Silicone Septa, 72pk E-mail this product to a friend Precleaned Volatile Organic Analyte (VOA) Sampling Vials • Container, liner, and closure cleaned, assembled, and lot traceable. • Open-top caps. • PTFE faced 0.125" silicone septa. • Cleaned to U.S. EPA Protocol B specifications.