Preassembled Screw Thread Closure and Septa, 9mm R.A.M. Smooth Royal Blue Cap, PTFE/Silicone with Cross Slit, 1000/CS SKU : 5395XF-09RB $252.60 Preassembled Screw Thread Closure and Septa, 9mm R.A.M.™ Smooth Black Cap, PTFE/Silicone/PTFE, 1000/CS SKU : 5396F-09