North American Salt 41013 American Stockman Plain White Salt Block Pet Supplement, 50-Pound 50 Lb. Plain White Salt Block Ag Salt Guaranteed 99.0-percent Pure Block Is Extremely Tough, Weather Resistant and Designed For Free Choice Feeding Excellent For Weight Gain, Feeding Efficiencies and Overall Herd Performance Formulated For All Classes Of Beef and Dairy Cattle, Pigs and Horses