The Hadley 29" 12V Rectangular Air Horn Kit is the perfect choice for those who need a loud and clear sound. This kit includes a 29" steel projector or trumpet with a chrome finish, providing a full and clear sound. The chrome-plated zinc alloy diaphragm ensures reliable performance over a long service life. The trumpet measures 8.7" x 4.5", making it the perfect size for any vehicle. With this kit, you can be sure to get the loud and clear sound you need. FleetPride is your First Click in Heavy Duty®.