Niobium (Nb) is named after Niobe, daughter of Tantalus. Ore reserves are found in Canada, Brazil, Nigeria, Zaire and Russia. Nb is used in pure and alloyed form in superconductors, sodium vapor lamps (street lights), rocket boosters and other aerospace applications. Hypoallergenic, nickel & lead free. It is great for anyone that has sensitive skin! 

4 Pair

Dimensions: 12.5mm