The suitable screw closures are ready assembled.
- Large range of screw closures with different septum materials and cap colours
- Including a magnetic version for CTC GC PAL autosampler or identical constructions
- Bonded screw caps (septa firmly connected with the cap) have the advantage that blunt HPLC needles cannot push the septum into the vial
- Septa made from economical Red Rubber/FEP, high quality silicone/PTFE (also slitted) or silicone/polyimide and from virgin PTFE