PTFE/Silicone Septa, Hand Crimpers, Syringe Filters manufacturer / supplier in China, offering 18mm Aluminium Screw Cap Gas Chromatography Gc Vials Wholesale Price, ND24 Screw Neck 40ml Lab Glass Transparent EPA Vial V4017/V4015, Wholesale Sample Vials 13mm Septa 13-425 PTFE Silicone Septum and so on.