24-400 Sample Storage Vials 20-60ml. 2ml Screw Vial 8mm Neck, 12*32mm, Screw Cap, Pre-slit Septa. 20ml Headspace Vial, 18mm screw cap, round bottom, 100/pk. 18mm Screw Headspace Vials, 10ml, Round Bottom, 22.5*46mm. 9mm Autosampler Vials with Caps & Pre-slit Septum. 2ml Glass Autosampler Vials for HPLC GC MS.