Features: 1) Characteristics: A) Silver gray or dark grey powder B) Heat-resistance and good performance 2) Usage: A) Basic raw materials that the high polymer of organic silicon formatting, such as Using for producing organic silicon monomer, silicon oil, silicon rubber antiseptic B) Applied to the refractory material and powder metallurgy trade C) Sublimated into the monocrystalline silicon, widely used in the hi-tech field D) Used as metal reducing agent in new-type ceramic alloy 3) Size: 2 - 8mm Packing: 1, 000kg/jumbo bag Composition: 1) Si-1: Si: 99. 5% min., Fe: 0. 3% max., Al: 0. 1% max., Ca: 0. 1% max. 2) Si-2: Si: 99. 4% min., Fe: 0. 4% max., Al: 0. 1% max., Ca: 0. 1% max. 3) Si-3: Si: 99. 3% min., Fe: 0. 3% max., Al: 0. 3% max., Ca: 0. 1% max. 4) Si-4: Si: 99. 1% min., Fe: 0. 4% max., Al: 0. 4% max., Ca: 0. 1% max. 5) Si-5: Si: 98. 5% min., Fe: 0. 5% max., Al: 0. 5% max., Ca: 0. 3% max.