septa for vial headspace with flat bottom manufacturer headspace vials in white with flat bottom manufacturer USA Headspace vial, flat top, flat bottom volume 10 mL, clear glass vial (flat top), flat bottom, O.D. × H × I.D. 20 mm × 54.5 mm × 12.5 mm, for Varian; find Supelco-854151 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.