... less than 1 micron. The purpose: The graphite is used widely ,such as for high temperature crucible , lubricant in engineering industry, ... for making refractory material, paint, stabilizer in arms industry, graphite brush in electic industry, catalyst for producing chemical fertilizer.Payment ... Irrevocable & Confirmed L/CPacking: 1000kgs/jumbo bagShipment: 20~30 days Amorphous Graphite ( high Sulfur)