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Description:Offer various type of Selenium Metal Powder with different spec. Se Cu As Fe Pb S 99% 0.001 0.003 0.001 0.002 0.005 99.5% 0.001 0.003 0.001 0.002 0.005 99.9% 0.001 0.003 0.001 0.002 0.005 99.992% 0.0003 0.0005 0.0009 0.0005 0.001 99.999% 0.00001 0.0001 0.0001 0.00003 0.0002 Should you have any inquiry,please feel free to contact us.