The first is the Screw Neck HPLC Vials, which has four sizes: 8mm, 9mm, 10mm and 13mm. The 8mm Screw Neck HPLC Vials has the smallest opening and is most suitable for Shimadzu’s Autosampler. The 9mm Screw Neck HPLC Vials can be applied to different types of Autosamplers. The larger opening and smooth shoulder-neck lines are very suitable for