PTFE/Silicone Septa, Hand Crimpers, Syringe Filters manufacturer / supplier in China, offering 6-20ml Crimp Top Headspace Vials for Gas Chromatography, Basic Customization 100ml 250ml 500ml Sample Bottle Gl32 Gl45 Screw Cap Rubber Silicone Septa, Lab Sample Storage 20-60ml 24-400 Glass Bottle Screw PP Cap Storage Vial Screw Caps Septa and so on.