white PTFE/red Silicone septa, black screw PP cap,5.5mm centre hole pre-slit white PTFE/red Silicone septa, 8mm black screw PP cap,5.5mm centre hole Model No. Size Description 100pcs/pk 11.6*32mm 2ml wide opening short screw-thread vial,clear 2ml wide opening short screw-thread vial,amber 2ml wide opening short screw-thread vial with write-on