Suitable for Aijiren, Waters, Brukers, PerkinElmer, ThermoScientifics, Shimadzu, CTC and other rotating or robotic arm samplers. The special thread design ensures a consistent seal. Clear vial, 3.3 Expansion borosilicate glass USP Type I, Class A ; Amber vial, 51 Expansion borosilicate glass USP Type I, Class B