... Direct Sales 3.2n,3n,3.8n,4n,5n,6n 4.timely delivery 5.Large concessions We ... manufacture our own 5N, 99. 999% purity polysilicon chunksSpec Table Lingshou County ... Mineral Processing Factory SpecElememt Content (w/%)Granularity Si 5N>99.999%FeAlCaTiNiCrCod90=20um0.000150.00010.00050.00050.00050 ... large scale integrated circuits. Polysilicon Chunk Purity 5N