Each batch of HPLC and GC-certified KTHE VIALs is tested on 15 crthe vialical parameters. In a realistic method, a HPLC/UV and GC/FID test of hplc vials &gc vials/closure combination for blanks and contaminations will be carried out. The batch-specific test certificate the vials the HPLC and GC-Chromatograms can be handed out upon request, Autosamplers can work day and night ,so the vials & septa & caps are key for their consistant work, We supply different color for all the seals ,and the vials can be customized as your request, All the vials can be steriled ,Multiple package are ready for your choice, How to choose the right vials ,and What to do when septa fall out ,Different seals fit for various vials with septa .