10mL round bottom headspace vial w/ 20mm Al crimp cap & silicone/PTFE septa, Use with the HS-10, HS-20, AOC-5000, and AOC-6000. Vial: 46 x 22.5mm, clear glass, 1st hydrolytic class, DIN crimp neck, long neck, round bottom. Cap: 20mm combination seal, Aluminum, plain, center hole. Septum: silicone white/PTFE beige, 45° shore A, 3.2mm.