HEADSPACE VIALS HEADSPACE VIALS BOROSILICATE GLASS CTC, Aijiren, ALPHA MOS, ANTEK, ATAS GL, BRUKER, DIONEX, GERSTEL, PERKIN-ELMER, SHIMADZU, TEKMAR- DOHRMAN, THERMO, VARIAN These screw thread headspace vials use convenient magnetic screw caps eliminating the use of crimping.