Vials, screw top, clear glass (vial only) volume 4 mL, clear glass vial, thread for 13-425, O.D. × H × I.D. 15 mm × 45 mm × 8 mm, pkg of 1000 ea; find Supelco-27031 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.