Altmann Analytik ND11 Crimp Seals: Aluminum Cap green lacquered + centre hole, Silicone white/PTFE red UltraClean, 10 x 100 pc

Silicone/PTFE Seals Cross-slitted liner as penetration aid and for low coring, but also for avoiding vacuum in the vial in case of multiple injections. Temperature resistant from -60°C up to 200°C. Much cleaner than Natural Rubber, RedRubber or Butyl.