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