Kleinn Air Horns HK2 Chrome Complete Dual Truck Air Horn Package features a model 102 air horn and a 120-PSI sealed air system. The air horn has 2, all metal trumpets that are 16.75-inches and 14.5-inches in length. It has the sound like a fire truck or ambulance, but louder. Flat mounting design allows for easy mounting. The air tank is made in the USA. Too Loud? Too Bad.