Chromatography Vials | VWR Description: Clear 20 mL headspace vials with 20 mm crimp seals, designed to fit most headspace autosamplers. Certificates ,75983-246PK,75983-252PK,75983-250PK,75983-254PK,75983-244PK,75983-256PK,75983-248PK VWR autosampler vials, inserts, and closures HEADSPACE VIALS