LCGC Certified Clear Glass 12 x 32 mm Screw Neck Vial, Max Recovery, with Cap and Preslit PTFE/Silicone Septum, 1.5 mL Volume, 100/pk. Achieve the most reliable analysis results with the dependable Waters’ LCGC Certified Clear Glass Max Recovery vials. Waters offers the only vials chemically tested and certified for the LC and LC/MS analysis.