... process have excellent wear resistance, uniform particle size, and ultra-high shell content.Physical and chemical performance indexSpecific ... 7%3 [Filter] walnut shellAppearance:shiny ,beautiful, brown. High-quality fruit (coconut, apricot) shell as raw materials, it ... 0mm function:Polishing process of spectecles, jewelry, button, stamping parts, electronic parts, etc. different size Walnut shell used ...