... 5% min purity 2,shape :ingot/powder/ selenium isotope / selenium 74 Selenium ingot ,Selenium grain,Selenium powder 1, Physical character:Atomic Weight: 78. ... used in the preparation of the material of the selenium drum, photoelectric material, electrostatic photogragh and other ... %maxPacking25kg /iron drumSelenium GranuleSelenium ingotSelenium powder Selenium ingot ,Selenium grain,Selenium powder