... resistance&hardness&density 3.High precision 4.Oem offered 5.Good bearing parts Nantong Runfeng Powder Metallurgy Co., Ltd. is ... specializing in powder metallurgy,oil bearing part,structural parts,gears(sprockets) and different parts used ... gear,bevel gear,helical gear,sleeve,copper sleeve,sleeve bearing, bushing,bush,pulley,timing pulley,structural parts,powder metallurgy ...