Home / 20ml headspace vials with writing space Sigma 20ml headspace vials with writing space Sigma Headspace vial, beveled top, rounded bottom volume 20 mL Headspace vial, beveled top, rounded bottom volume 20 mL, clear glass vial, O.D. × H × I.D. 23 mm × 75.5 mm × 12.5 mm, for use with PerkinElmer, pkg of 100 ea; find Supelco-SU860049 MSDS, related peer-reviewed papers, technical