Aijiren’s Autosampler vials, caps and Septa can be Compatible with kinds of autosamplers, including Aijiren, Waters, Varian, Shimadzu, and etc. 8-425 vials are uniformly flat bottom for security with inserts. PTFE/Silicone Septa are most popular for HPLC applications; Pre-slit septa are casier to picrce with needles.