9mm Screw HPLC Vials for WATERS. High-quality silica gel guarantees good sealing performance, PTFE guarantees the corrosion resistance of the product, 2ml, 11.6x32mm sample vial, 9x1mm Teflon/silicone septa, 9mm polypropylene screw cap. 1.5ml Glass Vial. 9mm screw autosampler vial is widely used in laboratory chromatography analysis.