Nb bar size : dia.50mm Length :200mm standard : ASTM B392-95 Purity : >or =99.95%surface condition : honedMOQ:50kgdelivery time ;within 25daysWe can supply all kinds of products made of niobium ,such as Nb sheet ,Nb tube ,Nb bar and so on .any need ,please contact us . Nb bar ,niobium rods