Vials, screw top, graduated, open-top cap, preassembled volume 2 mL, clear glass vial, thread for 8-425, O.D. × H × I.D. 12 mm × 32 mm × 4.6 mm, PTFE/silicone septum; find Supelco-27516 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.