Common use 20ml headspace vials factory China 2ml Clear Glass Vial with Cap Septa - China Glass 1.The vials can be used on all common autosamplers ,preferentially they are found on HTA,Shimadzu,Thermo,Varian,Aijiren Technology,etc. 2. 2ml ,12*32mm vials are manufactured of Clear,Type 1 Class A or Amber ,Type 1 Class B borosilicate glass and with or without a write-on patch for sample