PTFE/Silicone Septa, Hand Crimpers, Syringe Filters manufacturer / supplier in China, offering Wholesale Gc Headspace Vials with 18mm Metal Thread Caps, China Supplier Borosilicate Glass Gc-Ms Headspace Vial with Lid and Crimp Cover, Lab Sample Storage 8-12ml Amber Glass Vial with 15-425 Screw Cap and PTFE Silicone Septa and so on.