... Competitive price 3.High quality 4.Best Service Lead powderGrey powder with drop form, easy to be oxidized in the ... 400 mesh,500 mesh and so on.PACKING AND STORAGE Iron barrel or plastic bag package.Carefully keep away from moist ... bearings self-lubricated, structural parts of powder metallurgy, friction discs, sheathing boards of brakes, clutches, metal-graphite electric brushes, diamond grinding ...