2ml Crimp Top Vials for Water Autosampler. The 2ML HPLC Crimp Top Vial is very suitable for HPLC analysis, because it has good sealing properties and guarantees the same quality of samples. Crimp Top Vial should be used with Crimper and Decrimper. Crimp Top Vial of different calibers needs to be used with different Crimper and Decrimper.