Cap including septum, consisting of silver lacqueered alumium-cap, 11 mm crimp top, with 5.5 mm center hole; septum white / blue silicone / PTFE, 55° shore A, 1.5 mm thickness, cross-slit

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