Red PTFE/white Silicone septa, 9mm yellow short screw-thread polypropylene cap, 6mm centre hole. Red PTFE/white Silicone septa, 9mm green short screw-thread polypropylene cap, 6mm centre hole. White PTFE/red Silicone septa, 9mm blue short screw-thread polypropylene cap,closed top. This is the end of the introduction of HPLC Vials Caps with Septa.