17 mm Blue PTFE/White Silicone metal S
Perkin Elmer 18 mm Blue PTFE/White Silicone metal S; 18 mm Blue PTFE/White Silicone metal Screw Cap/Septa 1.5 mm thickness 8 mm hole Pkg 100 - PE
Perkin Elmer 18 mm Blue PTFE/White Silicone metal S; 18 mm Blue PTFE/White Silicone metal Screw Cap/Septa 1.5 mm thickness 8 mm hole Pkg 100 - PE