Roto Salt Salt Block, Red, Nutritional Information: 96.5% Minimum Salt (NaCI), 98.5% Maximum Salt (NaCI), 5000 ppm Minimum Zinc (Zn), 4000 ppm Manganese (Mn) Minimum, 2500 ppm Minimum Copper (Cu), 150 ppm Minimum Cobalt, 40 ppm Minimum Iodine (I), 20 ppm Minimum Selenium (Se), Package Size: 4 lb, Compositions: Salt, Mineral Oil, Zinc Oxide, Maganous Oxide, Copper Oxide, Copper Sulfate, Cobalt Carbonate, Calcium Iodate and Sodium Selenite