LCGC Certified Clear Glass 15 x 45 mm Screw Neck Total Recovery Vial, with Cap and Preslit PTFE/Silicone Septum, 3 mL Volume, 100/pk. Autosampler Vials, Inserts, and Closures | Fisher Scientific. Autosampler vials hold samples that will be injected from an autosampler into a chromatograph or similar analyzer. A needle is used to pierce the cap and