Home » News » HPLC Septa Cap » Wheaton septum cap for wholesales Sigma 2ml vials with caps in amber for HPLC sampling 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