Kleinn Air Horns 730 Triple Train Horn with Valve - Black Three Trumpets, 18.5-Inches, 14.75-Inches and 10.5-Inches Deep, Loud Train Horn Sound Requires 150-PSI Onboard Air System (Not Included) Vortex 7 12 Volt Heavy-Duty Brass Body Solenoid Included XCR 2.0 Coated Black Removable Trumpets