Selling from factory directly,so that we have great advantage on price. We have our own laboratory. We make test to each order our company , XIAMEN K METEL CO.,LTD have our own 4 factories of silicon metal and aluminium ingot in China, we can produce all kinds specification of silicon metal, especially high purity grade, such as 553# 441# 3303# 331# 2502# 2202# 1501# and 1101# with low P, B, More ...