copper powder 99.7% water atomized,elecrolytic,ultrafine copper factory ... CNPC brand copper powderelectrolytic copper powderatomized copper powderultrafine copper powder ELECTROLYTIC COPPER POWDERAPPLICATIONWidely used in diamond tools, carbon brushes ... 200mesh, 300mesh,325mesh,400mesh COPPER ALLOY POWDER (BRONZE AND BRASS) APPLICATIONWidely used in P/M oil-retaining bearings, diamond tools, filters, ...