The Kleinn HK5 Mini-Beast Dual ABS Train Horn Kit features dual black ABS trumpets measuring 15.5 and 10.5 inches in length that mount separately, each with its own mounting bracket and solenoid, to ensure a quick and easy installation. Designed for extreme durability, an effortless fit, and freakishly loud, extreme sound, this complete package includes a 150 PSI waterproof compressor, a 1.5-gallon steel air tank internally coated with Cortec against corrosion, and all the necessary hardware and wiring parts needed for a complete installation.