Vials, vial inserts, septa, and caps/closures with or without septa for use with autosamplers and autosampler vials; includes a variety of sizes, WATERS CERTIFIED SAMPLE VIALS - HPLC eShop. WATERS CERTIFIED SAMPLE VIALS chemical durability and heat shock are not factors. PTFE/Silicone septum bonded to the polypropylene cap, using.