1.PFM,Co/Cr alloy,suitable for long bridge 2.No dissolving result. 3.No side effects with human body,security in long term use PFM (Ni/Be free Co/Cr) NP alloyAlloy is from U.S. Argen, containing Co 61%, Cr 27%, is now the most widely used dental alloy. Contains no poisonous be and allergic Ni.1. Good biological compatibility,2. No dissolving result.3. No side effects with human body, security in ...