... &hardness&density 3.High precision 4.Oem offered 5.Sintered iron bush Nantong Runfeng Powder Metallurgy Co., Ltd. is specializing in ... spread out all over the the country, and we supply components to Korea, America and japan. Our products are well known ... gear,bevel gear,helical gear,sleeve,copper sleeve,sleeve bearing,iron bush, bush,pulley,timing pulley,structural parts,powder metallurgy parts ...