Autosampler Vial, 2ml HPLC Vial, Clear Chromatography Lab . 3. 2ml Capacity,12x32 mm Dimensions, Screw Thread 9-425 Neck,100/pack 4. Standard Autosampler Sample Vial with Writing area for HPLC & GC Chromatography, vials can be used for high performance liquid chromatography and gas chromatography for reliable analysis results 5.