... 0.05g/cm Color: Yellow-brown granules 2 [Polishing Material] walnut shellSuch polishing materials processed by the special process have excellent wear ... , economic and durable and so on.Uses: It is used for oil field, refining, environmental protection, chemical industry wastewater ... .6mm 1.0-2.0mm 2.0-4.0mm function:Polishing process of spectecles, jewelry, button, stamping parts, electronic ...