Ferro Sililcon 1) Spec: Si:65,70,72,75 2) Size: 10-100mm, 1-3mm,3- ... % 0.75~1.25% BALANCE 70%Min 0.5%Min 2.5%Max BALANCE 65%Min 2.0% 4.5%Max ... Specifications:Ferro Silicon : Si: 75% min; 72% min; 70% min; 68% min; 65% min; Size: 20-150 mm 90% min. Or other ... %maxsize: 10-100mm, 20-150mm,ETC.(90% min.)Si:70%min Al:2.0%max C:0.2%max P ... maxsize: 10-100mm, 20-150mm,ETC.(90% min.)Si:65%min Al:2.0%max C:0.2%max P ...