Supplies calcium, magnesium, phosphorus and potassium to ensure normal levels in the blood in cows before, during and after calving. Give one tube within 612 hours prior to calving. Give another tube within 612 hours after calving. Guaranteed Analysis Calcium (min.), 13.5% (54 g) Calcium (max.), 15.0% (60 g) Phosphorus (min.), 2.5% (10 g) Magnesium (min.), 0.725% (2.9 g) Potassium (min.), 0.25% (1 g) Ingredients: Calcium chloride, gel base, calcium phosphate, magnesium chloride, potassium chloride.