White PTFE/red silicone septa, 9mm blue short screw-thread polypropylene closure, 6mm center hole, 100ea/pkg. Our White PTFE/Red Silicone Septa is a reliable and robust septum that can be used in various applications, such as chromatography and sample preparation. The 9mm blue short screw-thread polypropylene closure ensures a secure connection with your vial, while the 6mm center hole allows you to insert your desired syringe or needle. Each package contains 100ea of our septa. Our White PTFE/Red Silicone Septa is designed for superior performance and quality assurance, so you can trust that it will work how you need it to. Get your White PTFE/Red Silicone Septa today and enjoy hassle-free sample preparation. Thank you for choosing Aireka Scientific!