8mm Autosampler Vial Septa - Thermo Fisher Scientific 8mm Autosampler Vial Septa Related applications: Industrial Chromatography 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 Choose from Thermo Scientific