Price : Get Quote High density Ceramic permanent magnet is standard. Rare Earth magnets are available. : Rated Capacity : Increases with drum diameter and larger face widths. Contaminant Removal : For removing weakly magnetic or fine iron impurities from minerals, food products, glass, slag and ores. Nominal Diameters : 320, 400, 500, 650, 800, and 1,000mm and with various face widths.