MAC-SURE 21 • Description: A Potent Combination Of Organic Trace Mineral Vitamin, Antioxidants With Bio-active Chromium. • Indications: o Nutritional Deficiency o Repeat Breeding o Loss of Libido o Better Conception Rate • Dosage: 1 Bolus daily for 21 days or As directed by the Veterinarian. • Packing: 21 Bolus.