LCMS Certified Clear Glass 12 x 32 mm Screw Neck Vial, with Cap and Preslit PTFE/Silicone Septum, 2 mL Volume, 100/pk . Use the LCMS Certified Clear Glass 12 x 32 mm Screw Neck Vial to store your solvents, solutions, and samples in a safe and chemically inert environment to get the most reliable analysis results.