837 - CANNON BALL EXPRESS EV12 - Built with heavy-duty 12 volt electric solenoid. When a truck owner demands a ultra powerful horn, the CANNON BALL EXPRESS is the one to choose. Gives any truck a true train horn sound. Constructed of all metal with three triple chrome plated trumpets. The horn base is plated steel. The Cannon Ball Express requires an on-board air system. Comes with all required mounting hardware and 10-foot length of 1/4-inch nylon high pressure hose.
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