Kleinn Air Horns HK3 Chrome Complete Triple Air Horn Package features a model 130 air horn and a 130-PSI sealed air system. The air horn has 3, all metal trumpets that measure 14.5-inches and 11.5-inches and 9.25-inches in length. It has the sound like a fire truck or ambulance, but louder. Flat mounting design allows for easy mounting. The 1-gallon air tank is made in the USA. Too Loud? Too Bad.