screw top 20ml headspace vials with cap wholesales Perkin Elmer wide opening gas chromatography vials for wholesales-Headspace Vials 20 Mm Crimp Top Aluminum Silver Cap With PerkinElmer 2021 – 05 – 27 These caps are compatible with CTC Combi PAL (Varian, Gers, Shimadzu, ATAS), HP, Perkin Elmer, and Aijiren and are suitable for a wide