There are many types of Cap and Septa in the picture, including 24mm Screw Cap, 20mm Aluminum Cap, 13mm Screw Neck Cap, 11mm Snap Cap, 11mm Crimp Neck Cap, 9mm Screw Neck Cap, Natural Rubber/PTFE Septa, Silicone Septa, GC Septa, etc. . Aijiren uses high-quality raw materials to make Closures.