Choose Thermo Scientific SureSTART 20 mm Septa (Level 2), available in various pack sizes of Silicone/PTFE or Butyl/PTFE Septa, manufactured with 45 and 50 shore hardness to suit a variety of GC applications
Silicone/PTFE - Ideal for temperatures - 60 - 200°C and soft/thin septa great for thin, fragile needles.
PTFE - Ideal for temperatures -200 - 250°C and highest solvent stability