Headspace screw caps and crimp caps come in a variety of styles and materials including aluminum, bimetal, and steel; headspace cap septa are available in PTFE/silicone, molded PTFE/butyl, and high-temperature options. Aijiren headspace vials and caps are a perfect fit for a wide variety of applications, including pharmaceutical, environmental, energy and fuels, forensics, materials science, biopharmaceutical, proteomics, and metabolomics.