2ml Clear autosampler vial,12mm Diameter, 32mm Height, 9-425 screw top, and included blue ABS Screw Cap & Septa (Red PTFE/White Silicone Septa). Standard Autosampler Vial for HPLC & GC Chromatography, vials can be used for high performance liquid chromatography and gas chromatography for reliable analysis results.