HPLC-GC VIALS AND CAPS - FlipHTML5. Screw Neck Vials ND8, small opening, 8-425 thread and Micro-Vials ND8. Micro-Inserts for Vials with small opening ND8 Vial, 32 x 11.6mm, clear. VWR® Autosampler Vials, Inserts and Closures. 2mL, 12x32mm, 9mm Wide Opening Screw Thread Vials and Inserts Cap/septum tested for sealing and residue by GC headspace.