When a vehicle owner demands a powerful sound, the Cannon Ball Express air horn is the horn! 16-1/2"L x 14-3/4"W x 11"H overall. The horn's base is painted black enamel. Built-in 12V electric solenoid. Includes 10-ft. 1/4" high-pressure nylon hose and mounting hardware. Requires an onboard air system - sold seperately.