Promectin Plus Mini is the smallest, lightest and easiest-to-use horse wormer available, providing full-strength, broad spectrum parasite control. Horses greater than 300 kg but less than 600 kg should be treated with Promectin® Plus MINI for Horses. Again, irrespective of the horses specific weight within this range, the entire contents of the tube should be administered. If your horse is more than 600 kg, use one Horse and one Foal and Pony for animals 600 - 900 kg. For more than 900 kg, use two Horse tubes.