... .Factory price 3.ISO9001:2008 Metal silicon lump 5531. China industrial silicon lump 553 for aluminum alloy, ADC12, A3562.2. Size ... Centers in Yingjiang, Yunnan Province, Huaihua, Hunan Province and Xinyu, Jiangxi Province, we also have offices in Xiamen, Beijing and Shanghai ... SGS in silicon field. Safe Packing and Container Loading: China industrial silicon lump 553 for aluminum alloy, ADC12, A356