Niobium sputtering targets， Niobium disc Material: RO4200-1， RO4210-2 Size: circular targets:　 Diameter　 10mm up to 400mm x Thickness 2mm up to 28mm rectangular targets: Thickness 1mm up to 20.32mm x Width up to 800mm x Length up to 3000mm Purity:　 >=99.9％　 or　 99.95％