The J.G. Finneran Associates PTFE and silicone septa provides a seal between a vial and closure (sold separately) and provides access to samples via injection. It is used in volatile organic analysis applications. The flexible PTFE (polytetrafluoroethylene) and silicone construction provides durability and resistance to chemicals. Each septum measures 24mm in diameter and 2.54mm thick.
J.G. Finneran Associates manufactures glass and plastic labware. The company, founded in 1977, is headquartered in Vineland, NJ, and meets International Organization for Standardization (ISO) standard 9001.