8-425 Auotsampler Vial for Aijiren N--Aijiren Vials for HPLC. The 8-425 Autosampler Vial produced by Aijiren has a diameter of 8mm and a longer neck thread to ensure a tight seal. The amber and clear glass colors protect the sample type. The size of the vial is 11.6*32mm, and the glass is borosilicate. There are 5.0 and 7.0.