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

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

N20 Septa Butyl light gray/PTFE, 3mm, th., pk/100

N22 septa Butyl red/PTFE grey, Th. 2.4mm, pk/100