In chromatography analysis field, 8mm short screw vials is widely used in Life science and technology, Environmental Protection, Food safety. 2ml Autosampler Vials 8-425 neck finish represents a hplc vials &gc vials, the vials a diameter of 8 mm across the outside of the threads and a thread style of 425, Vials has clear and amber, Screw Cap in Lab most of the 2ml vials are 12*32mm.