Kleinn Automotive 411 Single Roof-Mount Horn

411 Roof Mount - 25" Round Chrome Air Horn - 1/4" Line Input - Big Rig Authority Equip your truck with the Kleinn 411 direct-fit single chrome-plated roof-mount air horn system, featuring a single premium all-metal trumpet measuring 25 inches in length with an oversized bell end to deliver the ultimate big-rig sound. Engineered for universal semi-truck and commercial vehicle applications, this massive, heavy-duty roof-mounted configuration allows you to command the road with a deep, authentic, and deafening locomotive-style blast. Designed for clean external mounting on custom or commercial rigs, this high-performance horn kit requires an onboard pressurized air system and can be operated using a manual hand-pull air valve or an electronic solenoid valve. For a proper, leak-free setup right out of the box, the installation requires a Model 330 Roof Mount Air Horn Fittings Kit, providing the ideal balance of gleaming chrome style and serious acoustic presence that serious custom truck builds count on. Manual Hand Pull Air Valve 310 or 311 / Solenoid Required Chrome-Plated Stainless Steel Construction One Trumpet 24" w 1" Base Dimensions (in): 25 x 6 x 6 Output (dB) @ 150 psi 150.1