Headspace vials and caps. 6, 10, 20, and 22 mL headspace vials for applications such as GC headspace, VOC, Karl Fischer, and TOC, regardless of instrument supplier. We offer both shrink and screw caps, various vials & caps, with septic materials such as butyl, butyl / PTFE, Silicone / PTFE. Manufacturing certified according to ISO9001: 2015.