Autosampler Vials for GC and HPLC with Screw Caps Screw Autosampler Vials for GC and HPLC is the most used in 2ml Autosampler vials.It is suitable for 2 ml vials and caps supplier, AB Sciex, Brook, Techcomp, PerkinElmer, glass vial caps supplierScientifics, glass vials with caps supplier, glass vials and caps manufacturer, CTC autosampler and other rotary or robotic arm samplers.40% larger