Round or rectangle-flat niobium clad copper bars and rods Clad material: Nb, Ni,Ta Core material: Cu acc. to E-Cu58, CU-ETP, CW004A, UNS No. C 11000 Dimensions: Form Dimension in mm Dimension in inch Round 6,35 - 78mm 1/4” - 3” Rectangle-flat up to 20 x 120 mmup to 0.8" x 4