Sonic Blast Horns are a great option for uses where flammability is a concern including industrial safety, construction sites, confined spaces, boating and emergency alarm stations. Has a chrome plated metal horn top for extra durability. Provides a piercing 120dB blast at 10 feet. Meets US Coast Guard requirements for boats up to 65′ (20 meters). Provides up to 56 blasts per can. Refills available.