Sigma-Aldrich is proud to present plethora of vials for chromatographic applications. wide opening headspace gas chromatography with flat bottom Headspace vial, screw top, rounded bottom (vial only) volume 20 mL, clear glass vial, thread for 8, O.D. × H 22.5 mm × 75.5 mm, pkg of 00 ea; find Supelco-SU860097 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich