Seal G13 for 4mL vials PTFE/silicone, pk/100

8mm x 0.040" Red PTFE/SIL/Red PTFE Septa, pk/100

8mm x 0.045" PTFE/Red Rubber Septa, pk/100

13mm x .100" PTFE/Silicone - 10mil PTFE/90mil Sili