Among the HPLC Vials provided by Aijiren, there is an HPLC Vial with a capacity of 4ml, which is twice as large as the popular 2ml hplc vial, and its caliber is also larger than the ordinary hplc vial, which is 13mm wide. The large-capacity Vial can accommodate more samples, and the wide caliber can also accommodate the in and out of the thick-mouthed automatic injection needle. 4ml HPLC Vials is very suitable for the analysis of equipment with a large number of samples.