gc headspace vials with flat bottom Sigma Headspace vial, clear glass, beveled top, flat bottom | Sigma Headspace vial, clear glass, beveled top, flat bottom volume 20 mL, O.D. × H × I.D. 23 mm × 75 mm × 12.5 mm, pkg of 100 ea; find Sigma-Aldrich-27199 MSDS, related peer-reviewed papers, technical documents, similar products & more