Falcon Safety Commander 4 Horn Gas-powered Air horn for rescue or security Use 100% ozone-safe, nonflammable gas Chrome-plated valve & Polished chrome trumpet Weatherproof & stainless steel zinc alloy Rugged, die-cast construction for extra strength Gas-powered Air horn for rescue or security Use Chrome-plated valve & Polished chrome trumpet Weatherproof & stainless steel zinc alloy Rugged, die-cast construction for extra strength 100% ozone safe Non-flammable Totally weatherproof with stainless steel diaphragm Rugged, heavy-duty zinc allo, diecast for extra strength Meets U.S. Coast Guard recommendations for boats up to 65 feet (20 meters)