Screw top vials are used on many autosamplers. The threads on the standard vials are 10-425. Suitability Autosampler compatibility: PerkinElmer Autosystem PE ISS-100, 200, Integral 4000 and Series 200 Shimadzu GC and LC Autosamplers Spark Marathon, Midas, Triathlon Thermo HPLC Spectra System aijiren Technology Alliance