24mm VOA vials for lab use Shimadzu Sigma TOC/VOC EPA vials PTFE silicone septa with cap--glass amber EPA vials for wholesales Shimadzu-Lab Consumables Supplier 40mL 27.5x95mm Clear Glass EPA/TOC Vial 24-400 White Open Top PP Screw Cap with 22mm Natural PTFE/White Silicone 3.0mm thick Septa (