... ,Al,P 2.Packing:1t/big bag. 3.Brand number:553#,441#,421#,3103#,2503#,2202#,1515#,etc. 4.Manufactory. Product ... Composition We could supply all kinds of slicon metal, eg.553#,441#,421#,3103#,2503#,2202#,1515#,etc. According to the ... Metallurgy Fire-Resistant Material Co., LTD Refractory material silicon metal 553# 441#