The safe, easy way to administer medication to cattle of all sizes, eliminating coughing and spitting out. The Springer Magrath Bolus Gun is made of industrial-quality aluminum that holds up to rugged use and resists sharp edges that can cut and cause infections. Rounded leading edge allows easy insertion. Can administer up to five 1-pound boluses at one time. 2.25-inch diameter by 21.5 inches long.