Grade A (ASTM B-115-00)) 99.97% -99.99% Purity, Non-LME registered,Rejection below 99.97% Cu purity,eCobalt (CO): 0.20 ppmLead (PB): 0.20 ppmIron (FE): 2.00 ppmNickel (NI): 0.20 ppmAntimony (SB): 0.10 ppmArsenic (AS): 0.10 ppmBismuth (BI): 0.10 ppmTellurium (TE): 0.05 ppmSelenium (SE): 0.30 ppmSulr (S): 4.00 ppmSilica (Si): 0.30 ppmOxygen (O2): NIL