Kleinn Air Horns Model 412 Single Roof Mount Horn with Square Trumpet Openings

Kleinn Air Horns Model 412 — Single Roof Mount with Square Trumpet Openings Delivering deep, commanding sound with durable protection. The Kleinn Model 412 roof-mounted air horn features bold square trumpet openings and integrated covers to shield the horn from road debris and weather. Designed for trucks and heavy-duty vehicles, it produces a loud, attention-grabbing tone that cuts through traffic noise. Key Features Robust square trumpet openings for a distinctive, powerful sound profile. Protective covers to keep dirt, water and debris out of the trumpet toward long service life. Roof-mount design ideal for commercial trucks, RVs and emergency vehicles. Authentic over-the-road tone —loud, deep and highly audible at distance. Installation Notes Requires Kleinn Roof Mount Air Horn Fittings Kit (P/N 330) for proper installation. Valve options: manual valve or electric solenoid valve not included—select the control type that suits your vehicle and wiring. Why Choose Model 412? Engineered for durability and maximum sound output, the Model 412 combines rugged construction with a distinctive square trumpet aesthetic. Perfect for drivers who need a reliable, high-performance horn that stands up to harsh road conditions.