ferro silicon Ferrosilicon Lumps Si:75%/72%min Al:2.0%max C:0.2%max S:0.02%max P:0.04%max. Ferrosilicon Fines Si:75%/72% Al:2.0%max C:0.2%max S:0.02%max P:0.04%max Size:90%min or at buyer's option In 1mt PP woven bag . In 1mt pp woven bag Size:1-3mm,3-10mm,10-50mm,50-100mm 90%min or at buyer's option In 1mt PP woven bag .