网页HPLC Vials - 1.5 ml / 0.40 Dram Clear Screw Neck HPLC Vial. Features: 19mm screw vials can be used on all common autosampler. Short screw, long neck" to make the autosampler easier to capture. 9mm wider opening for easy puncture. 9mm PTFE/silicone septa, has excellent chemical inertness, acid and alkali resistance. 9mm screw blue open top pp caps.