Product : 441 Si: 99% min Fe: 0.4% max Al: 0.4% max Ca: 0.1% max Henan Aloy New Material Co.,Ltd, a Chinese manufacturer specializing in silicon metal 553/441/3303 , with high quality , fast delivery. This material is well-needed for aluminium manufacturer. If you are interested, please contact Julie Woo. I am always here for you.