... 2.Various grain sizes from rough to fine 3.Various diameter from 75mm-910mm 4.High quality ... 6A2, 11A2, 12A2, 11V9, 9A3 and so on 3. Diamond or CBN grain size can be from rough to ... from south korea 2) Excellent after-sales service 3) The products own longer service life, reaching to ... Tungsten carbide, steel, mold 2) Glass and optical glass 3) Stone, concrete, asphalt and ceramic 4) Magnets 5) Other ...