Silicon Metal 3303 1,Si: 99.3%min; Fe: 0.30%max; Al: ... , 0-5mm 2,CIQ ,SGS,ISO Silicon Metal for polysilicon 3303# Specifications: 1.CIQ ,SGS,ISO quality certificate.2. As your ... . Used in Automobbile wheel alloy. Pure Silicon Metal for polysilicon 3303#