... resistance&hardness 3.High precision 4.Oem offered 5.Sintered power tool bushing Nantong Runfeng Powder Metallurgy Co., Ltd. is specializing ... spread out all over the the country, and we supply components to Korea, America and japan. Our products are well known ... metallurgy parts,nut,auto parts,rotor and stator,steel sleeve,power tool bushing etc.