Vials, screw top, graduated, open-top cap, preassembled volume 22 mL, clear glass vial, thread for 20-400, O.D. × H 23 mm × 85 mm, PTFE/silicone septum; find Supelco-27520-U MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.