Iglobalbuy Train Car Truck Boat Motorcycle Super Loud Powerful 12v Dual Trumpet Air Horn Compressor Kit 135db 135DB, loud and powerful Weather resistant, striking appearance Comes with 1 set of dual air horn trumpet kit &air compressor& other necessary accessories. Fits any 12V DC car trucks boats , all types autombiles Horn sizes: 6.1", 8.2" in Length, 2.6", 3.2" in dia.