American Stockman® 41018T Big 6® Trace Mineral Block Ag Salt, 50 LbsBig 6 is the most popular trace mineralized salt in the eastern half of the United States. With the six core micro minerals required for animal health zinc, manganese, cobalt, copper, iodine and iron its the first choice for weight gain, feeding efficiencies and overall herd performance. For all classes of beef and dairy cattle, pigs and horses. Size: 50 lbs Contains the 6 core micro minerals: zinc, manganese, cobalt, copper, iodine, & iron Great for