Vial, crimp top, clear, certified, 2 mL, 100/pk. Vial size: 12 x 32 mm (11 mm cap) Autosampler Vials, Caps and Closures | Fisher Scientific Autosampler Vials, Caps and Closures Thermo Scientific™ 20 mm Headspace Glass Vials Headspace vials are available in clear or amber glass with a round or flat base, a crimp seal with a beveled or square edge finish, or with a screw-thread finish.