standard neck headspace gas chromatography with closures . Perkin Elmer clear vial septum cap for crimp vial-Aijiren HPLC Vials. Perkin Elmer round bottom headspace gas chromatography for Vial, 20mL, Clear, 20mm Headspace, Round Bottom, 23x75mm, 20mm Crimp, for use with Perkin Elmer Autosamplers P100 $49.10