Clear VOA Vials with 0.125 inch Septa; Clear Borosilicate glass vial with 0.125 inch Silicone/PTFE septum in a white PP cap Thermo Scientific® Clear VOA Vials with 0.125 inch Septa are designed for water sample collection for volatile organic analysis (VOA) and are available in 20, 40 or 60mL sizes.