网页8-425 Septa National Scientific PTFE Disk septa are chemically inert PTFE Red Rubber septa are economical for many GC applications PTFE/Silicone septa are most popular for HPLC and IC applications Pre-slit septa are easier to pierce with thin gauge needles Related Products: Septa Compare this item 2.0mL, 11mm Aluminum Crimp Seals with