Sigma 2ml vials with caps in amber for HPLC sampling price-Aijiren Hplc Vials Autosampler Vials, Caps and Closures Thermo Scientific 20 mm Headspace Vials, Septum, and Caps 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.