Browse Precleaned/Certified VOA Vials, Assembled with Open Top White Polyproplene Closures, Septum and Certificate of Analysis in the J. G. Finneran catalog including 20mL Vials, Precleaned and Certified - Class 3,40mL Vials, Precleaned and Certified . Voa Vials at Thomas Scientific. VOA Vials - Open Top Closures and Septum, Precleaned & Certified J.G. Finneran Available in clear or amber borosilicate glass. Choice of .125" or .100" PTFE/Silicone Septa. Available in standard, precleaned or