standard opening headspace gas chromatography with silicone septa Chrominex-Headspace Vials for Sale 2022 - 03 - 25 Shimadzu Scientific US WebstoreVials, 1.5mL Clear Silanized Glass Vial w/ Cap & Septa, Short Thread, 12 x 32mm, 9mm opening, 100/pk. 220-97331-67.