Blue Screw Cap 9mm PTFE Silicon Septa offered by us is highly appreciated for being chemically inert in nature and assuring long service life. It is widely utilized for sealing glass vials that are required for gas & liquid chromatography techniques. This cap is made of superior quality thermoplastic polymer for having good structural strength and light weight nature. It comprises CNC threading for providing tight & secure closing with optimum torque generation. Blue Screw Cap 9mm PTFE Silicon Septa allows user to withdraw sample from injection without even unfastening the cap hence prevents chances of contamination.