... to use, inexpensive and safe. Moreover, the pore size of the grinding wheel can be arbitrarily selected. Thus, in ... 0.4% Moisture content: 8.7%3 [Filter] walnut shellAppearance:shiny ,beautiful, brown. High-quality fruit (coconut, apricot) shell as raw materials ... .0mm 2.0-4.0mmfunction:Polishing process of spectecles, jewelry, button, stamping parts, electronic parts, etc. High quality garnet Abrasive