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in Waters
990967-912, A2013250X046, 880975-902, 993967-906, 880975-914, WAT054275, WAT045905, WAT046980, M05CLA25 grade Agilent columns, waters columns, and Kromasil columns have been used several times. The packaging box has been opened and the packaging box is still there. In addition to the Agilent column, the column effect test has been re-exerted with standard samples. If you are interested, you can send a test report. The column is packed well. If it is not easy to use, you can refund it. I will bear the freight.