Air Horn Kit Single Roof Mount Air Horn; Chrome Plated Zinc Alloy; 25 in.; Roof Mount; Incl. Vortex 4 12-Volt Electric Horn Solenoid; FEATURES: Single 25 in. Truck Horn Chrome Plated Zinc Alloys Loud And Deep Over The Truck Sound Comes With Hood Support; Mounting Hardware; Air Fittings Our newest roof mounted horn features a square end bell with integrated horn cover to keep the worst of the road can throw at you out of your horns. Air Valve not included. Kleinn automotive air horns offers complete air horn kits, train horns, roof mount truck horns, air systems kit accessories and off road lift kits.