1.5ml 9mm Short Thread Autosampler Vials ND9--HPLC. 1. 9mm screw vials can be used on all common autosampler. 2. Standard narrow neck design for GC and HPLC. 3. 9mm wider opening for easy puncture. 4. 9mm PTFE/silicone septa, has excellent chemical inertness, acid and alkali resistance. Technical Parameter.