... price 3.High quality 4.Best Service Lead powderGrey powder with drop form, easy to be oxidized in the ... porous bronze bearings self-lubricated, structural parts of powder metallurgy, friction discs, sheathing boards of brakes, clutches, metal-graphite electric brushes, ... wheels, bronze filters, and also used as the additives of rubbers and plastics, and in the production of chemicals. Lead powder