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

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

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

Nature PTFE/Nature silicone septa 22 x 3mm, pk/100