Metacam 20 mg/ml Solution for Injection for Cattle, Pigs and Horses Packaging Quantities Cardboard box with 1 colourless glass injection vial each containing 50 ml, 100 ml or 250 ml. Cardboard box with 12 colourless glass injection vials each containing 100 ml. Cardboard box with 6 colourless glass injection vials each containing 250 ml. Each vial is closed with a rubber stopper and sealed with an aluminium cap.