Brand New, Loud 4 Trumpet Train Sound Air Horn And Compressor/Tank kit. This Horn system produces a Loud Sound of 149 decibels. Trumpets are chrome plated metal. Will replace your original horn, or can be installed as an auxiliary horn. Comes with a 3 gallon air tank and 12 volt 200 PSI heavy duty maintenance free 100% duty cycle air compressor. Includes Mounting Hardware, Brass Fittings, Air Hoses, Electric Air Valve, 0-to-240 PSI Air Gauge, 170/200 PSI Air Pressure Switch, Teflon Tape Sealer, Air Safety Release Valve, Installation Instructions, and a Free Horn Button. Ideal for vehicles such as Truck, RV, SUV, Boats, Pick-Up, and many other applications. Trumpets Sizes: 16-3/4 inch, 1 4-3/4 inch, 11-3/4 inch, 9-1/4 inch, 3-3/4 inch in diameter. Air compressor size: 9-1/2 inch L x 4 inch W x 6-3/4 inch H. Air tank Size: 21 inch L, 7-1/2 inch H, 6-1/2 inch in diameter.