Description | Red PTFE/white Silicone septa, 9mm blue short screw-thread polypropylene cap, 6mm centre hole | Red PTFE/white Silicone/red PTFE septa, 9mm blue short screw-thread polypropylene cap, 6mm centre hole | Blue PTFE/white Silicone septa, 9mm blue short screw-thread polypropylene cap, 6mm centre hole | White PTFE/red Silicone septa, 9mm red short screw-thread polypropylene cap, 6mm centre hole | 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,cl |