PTFE/Silicone Septa, Hand Crimpers, Syringe Filters manufacturer / supplier in China, offering 18mm Aluminium Screw Cap Gas Chromatography Vials Wholesale Price, ND11 Sample Vial Cover Alumium Cap PTFE Silicone Septa Sc115111, Sample Vial Seal 11mm Crimp Aluminum Closure with Septa and so on.