Grade:4N Grade,99.99% minimum purity 5N Grade,99.999% minimum purity 6N Grade,99.9999% minimum purity High Purity Copper IngotGrade:4N Grade,99.99% minimum purity5N Grade,99.999% minimum purityForm:Cast ... The actual required diameter will be specified by purchase order. 4N 5N 6N* ≤100ppm ≤10ppm ≤1ppm GDMSAg,Al,As,Au,B,Ba ... ≤3ppm ≤3ppm ≤3ppm LECOS ≤5ppm ≤5ppm ≤0.5ppm GDMS High Purity Copper Ingot