20mm Magnetic Cap, gold lacquered, centre hole, Silicone white/PTFE, 100pcs/pk

Aluminum Crimp Seals ND20: Magnetic Seals for SPME-Vial 20 09 1222 for CTC
Special Silicone/PTFE liner with an only 0.05mm thin casted Teflon film instead of 0.13mm skived PTFE lamination that is standard for any other 20mm Headspace liner. Thus penetration is even easier, as PTFE is the hardest part to penetrate.
These special products should only be used in combination with the SPME-Vial 20 09 1222 which has a much thicker crimp neck than all standard Headspace Vials.
Much thinner liners for easier penetration of the sensitive phase.