Thermo Scientific Septa for 8-425 Screw Thread Caps are constructed of PTFE, PTFE/rubber, or PTFE/silicone to suit a variety of HPLC, GC and IC applications.
- 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