EP Scientific EPA Vials, Borosilicate Glass, with PTFE/Silicone-Lined Cap, Aijiren Tech. Supplier: Aijiren Tech. Description: Vials processed according to Level 1 are certified to meet or exceed EPA standards for volatiles. ,EP139-20CCS,EP341-40ADBCS,EP13920AEPCS,EP339-20CCS,EP341-40ACS,EP139-20CCTCS,EP140-40CCTCS.