The 6ml via is 22*38mm, flat bottom, and made of 5.0type General Chromatography – Aijiren Headspace Vials and Closures. Beveled-neck headspace vials are available in both 10 mL and 20 mL capacities, flat or rounded bottom. The 20 mm crimp caps What are headspace vials? – Wherevermag A sample of water is collected in the field in a vial w