Silicon 553 Silicon 441 silicon Composition：Si：98.5% Min Fe：0.5% Max Al：0.5% Max Ca：0.3% Max Composition：Si： 98.5% Min Fe：0.4% Max Al：0.4% Max Ca：0.1% Max Piece Size ： 10 - 100 mm 90% Min Piece Size： 10 - 100 mm 90% Min Packaging： in One-Ton Plastic Bags Packaging： in One-Ton Plastic Bags   Base Metals including AK5M2，AV95， AB87，Off-grades Primary Al A0 / AV98 Base Metals including AK5M2，AV95， AB87，Off-grades Primary Al A0 / AV98