Great for boating or for sporting events, the Marine Raider 1.4 oz Marine & Sport Air Horn helps you get noticed. The 1.4-ounce canister is replaceable and USCG approved for a sound-producing device on boats up to 39 feet, and the painted steel and plastic construction can withstand tough conditions on the water. Marine Raider 1.4 oz Marine & Sport Air Horn, 1-1/4 Oz - Marine Safety at Academy Sports