transparent VOA vials for lab use VWR that meet or exceed EPA requirements - VWR International Clear VOA Vials with 0.125 in. Septa 6 Premium Pack Clear VOA Vials with 0.125 in. Septa 8 • Unique Field-to-Lab carton conveniently converts to a vial organizer tray for convenient lab use (unbonded septum varieties only, 20 mL and 40 mL).