Chrominex 40ml VOA vials supplier 40mL Clear VOA Vial Assembled w/Open Top Bonded T/S Septa {Heavy} Cap, – PRM Filtration Greenwood Products 03-40BTS723 40mL Clear VOA Vial Assembled w/Open Top Bonded T/S Septa {Heavy} Cap, Certified (Case of 72) Open top VOA vials meet or exceed EPA standards for volatile organic sampling.