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"Diamond is the hardest material in the world". It is formed by natural crystal which is single crystal without grains Diamond of South Africa is especially better the home diamond in hardness and tough degree. Such as mold holes are especially easy to be gained smooth face, easy to be extruded with high speed, and the life of drawing wire is been increased, also decrease the risks of unfasten split. We recommend you use especial bright mold to make article mold (Coil out mold), slight silk mold, line material surface. Suitable for drawing platinum rhodium wire, gold wire, silver wire, copper, aluminum, molybdenum, nickel, tined, copper, tungsten, copper aluminum alloy and other nonferrous metal wire material.Products SpecificationNatural diamond grinds flat face National first diamond, second diamond