Double tube air horn for train ship SUV RV truck motorcycle chrome plating1、Super Loud : Super loud 300DB sound. The sound could spread a far distance, please do not use it near school or hospital. 2、Double Tube: The double tube horn is designed for customers looking for a loud and affordable air horn. It is enough for everyday use. 3、Wide Application: Designed for exterior mounting on any 12V 24V vehicles, trucks, SUVs, RVs and boats motorcycles etc. in a fresh or salt water environment . 4、Durable Material: Made of zinc alloy chrome‑plated, can work in a variety of temperature environments. Gas tank with stainless steel extends the sound of the horn, protect ears. Tough and long‑lasting, no oxidation. 5、Stylish Appearance: Zinc alloy double‑pipe horn, stainless steel gas tank, high‑quality solenoid valve, aluminum alloy base, lustrous and different appearance, stylish silver, showing you something different. 6、Easy Installation: The air horn is easy to install, it is flexible and portable so it has the reflexes to take from one car to another easily.