In aijiren product catalog, there are 6ml, 10ml, 20ml vials, whose size of mouth is 20mm crimp vial. A mixture of NDMA and NDEA was used to prepare calibration curves ranging from 2.5-10 ug/L. 1-4mL Autosampler Vials for HPLC, UPLC, GC 16mm, 25mm Test