1.5mL 11mm Snap Ring Autosampler Vial ND11--Aijiren HPLC Vials. 1. 11mm Snap Ring Vial can be used on all common autosampler. 2. Standard narrow neck design for GC and HPLC. 3. 11mm wider opening for easy puncture. 4. 11mm PTFE/silicone septa, has excellent chemical inertness, acid and alkali resistance. Technical Parameter.