Dec 29, 2020 · Dec. 29th, 2020. Aijiren produces 2ml Chromatography Vial in three different types of calibers, Screw, Snap and Crimp. These three types of Vial are Aijiren's best-selling products, which can be matched with different brands of HPLC Autosampler and are essential chromatographic consumables in the laboratory. 2ml Screw Neck Vial by Aijiren,the