Waters Certified vials are tested for cleanliness by HPLC and held to tightest dimensional tolerances in the industry. LCGC Certified Amber Glass 12 x 32mm Screw Neck Vial, with Cap and Preslit PTFE/Silicone Septa, 2 mL Part Number: 186000847C. ----. Buy Now. Deactivated Amber Glass 12 x 32mm Screw Neck Vial, 2 mL Volume, 100/pkg.