... resistance&hardness 3.High precision 4.Oem offered 5.Graphite bronze bushing Nantong Runfeng Powder Metallurgy Co., Ltd. is specializing in ... --resizing--cleaning--vacuum oiling--packing3.material:steel,copper,steel copper,bronze,alloy.4.produce equipment:200T,100T,60T,25T,15T,10T ... parts,powder metallurgy parts,nut,auto parts,rotor and statorgraphite bronze bushing etc.