Screw cap with hole, black, for 4ml vial, pk/100

N9 PP screw cap, blue, SIL/PTFE, pk/100

9mm Natural Cap with PTFE/Sil Septum, pk/100

Screw closure N9, PP, blue, hole, Sil/Polypropylene, 1.0mm, fluorine-free, pk/100