Headspace gas chromatography requires headspace vials and caps because they can withstand the pressure from the gas. Chrom Tech has a wide selection of high-quality crimp and screw thread headspace vials available in clear or amber glass with associated 18-and 20-mm headspace closures. Our headspace vials can be ordered as either flat or round bottom, and we offer many types of caps to be paired with your vial including, aluminum, pressure-released lined, and magenetic-lined seals. These vials and caps feature lab-grade materials for optimal durability and purity. Contact one of our experts if you have any questions about these vials.