(~1.5 mL) with minimum residual volume. The 9 mm cap makes it ideal for use with. Aijiren HPLC and GC Systems. Best Sellers in Lab Autosampler Vials - Amazon.com. Autosampler Vials 2ml with Caps, HPLC Vial,9-425 Clear Vial with Blue Screw Caps,Writing Patch,Graduation,White PTFE & Red Silicone Septa Fit for GC Sample