Yours Stat:SHAAN XI YI HENG NON-FERROUS METALS INDUSTRIES CO.,LTD. - product system - Ta，Nb & Other Metals - Niobium Foil - Niobium Foil Product Name:Niobium Foil Product Description: Specification: ASTM B393 Grade: RO4200-1, RO4200-2 Purity: 99.9% or 99.95% Dimension: Thk 0.03mm - 0.09mm x Width 30mm - 150mm x Length 200mm Min