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This powerful quad trumpet air horn produces a loud roaring sound. Black color, made entirely of metal for maximum protection against all weather conditions. Horn comes with a 12V solenoid, hose and mounting hardware. An on-board air system is required for operation. Ideal for all vehicles with a 12V system. This horn is sure to draw all the attention you are looking for. Quad Trumpet Train Air Horn (Black) Metal Construction 12V Electric Air Valve (Solenoid) with Compression Fitting ¼" OD Nylon Plastic Hose (6 Feet) Mounting Hardware Included Dimensions: Trumpets: 13-¾" L, 11-½" L, 9-¼" L, 7-¾" L x 3-¾" D Overall: 14" L x 6-¾" W x 6-½" H Note: Onboard Air System Required