The novaphit ^® range materials can be found in applications where the highest safety aspect is combined with absolute application limits. The expanded metal made from 1.4404 (AISI 316 L) as used in novaphit ^® SSTC, novaphit ^® SUPER HPC, and in the most innovative material in the range, novaphit ^® SSTC^TA-L, is superior to any common inserts from tanged- and flat metal in terms of recovery and its positive influence on leakage. The purity of the graphite used is at least 99%.