Niobium, formerly columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41.
N 0906 (OTTO) Niobium chunks, 4-10 mm, 99.999% Cas 7440-03-1 - used in applications as jet engine components, gas turbines, rocket subassemblies, turbo charger systems, heat resisting, and combustion equipment.