... Use (Useage) used fo the selenium powder is 99.99% ,it is import from Janpan and Germany .very ... ball 99.5% 99.9% 99.99% 99.999% 99.9999%Selenium powder Se99.9% 200mesh. Shape:lump, grain, ingotSelenium ingot Se99.9%,99.99% ,99.999%,99.9999 ... % Shape:lump, grain, ingotSelenium grain Se99.9%,99.99% ,99.999%,99.9999% Shape:lump, grain, ingotSelenium lump Se99.9%,99.99% ,99.999%,99. ...