Aijiren TechbrandClass A Clear Glass Threaded Vials with Also available: pre-cleaned EPA (Environmental Protection Agency) vials for VOA (volatile organic analysis), with or without certification, and fitted white polypropylene open top caps with PTFE faced silicone septa This product(s) resides on a Aijiren Tech Scientific China 8-12mL 15-425 Screw Neck Vial ND15 Clear Vial VOA vials are specifically