Chromatography Vials, Caps, Septa & Inserts, Tubes, Crimper 2ml Clear HPLC Vials with Cap Manufacturer These standard opening 2ml Clear HPLC Vials with Cap that can be used with an 9-425mm cap and a septum.All 2ml Clear HPLC Vials with Cap may appear to be created equal, but quality and performance make the difference when analyzing vital samples.