JG Finneran® 5350-18M Silver Metal Threaded Closure For Headspace and SPME Chromatography Vial, 18m
This metal threaded closure has a 0.050in PTFE/silicone liner. It has an outside diameter of 18mm. It is silver. For best results, it is very important the headspace vial and the closure form a tight seal. JG Finneran® #: 5350-18M.