Calcium silicon: Ca:28-32%, Si:55-65%.Size:10-100mm,0-2mm, ... follows for your reference.1. Commodity: Calcium silicon Ca:28%-32% min 2. Specs: Ca: 28-32% or 30% min; Si: 55 ... . Quantity: 500MT/Month(20MT/20'FCL.)8. Validity: To Nov.26,2012.Please check it and let me know your detailed ... Best RGDSPei zhengyangTel: 86-353-2023046Mobile: 86-13835310865 Calcium silicon Ca:28%-32% min