We offer quality oxygen-free copper 99.999% The isotopic composition of copper 99999: Cu63 = 69, 09% + - 0, 05% Cu65 = 30, 91% + - 0, 03% We offer quality oxygen-free copper 99.999% The isotopic composition of copper 99999: Cu63 = 69, 09% + - 0, 05% Cu65 = 30, 91% + - 0, 03% Production capacity up ...