ultra clean 40ml VOA vials for soil Wheaton Pre-Cleaned/Environmental Sampling Vials | SECO LabBest Class 3 Certified VOA Vial with Polypropylene Closure and 0.1" PTFE/ Silicone Septa, 40 ml, Clear VOA Vial, 40 ml, Clear, Borosilicate Glass, Precleaned and Certified Type, Class 3, 24-414 mm Thread Size, Open Top Type, White