Air Horns for Trucks; Dual Big Rig 29" with 12-Volt, 130 PSI Compressor & Tank Two Chrome Big Rig Truck Horns (Dimensions: 29"L x 7.75"W x 5.5"H) w/ 12v Electronic Solenoid All-in-one Air System w/ 130 PSI Compressor & 5 Liter Air Tank (Dimensions: 24" L x 5.25" W x 6.75" H) Kit includes a pressure switch (100 PSI on/130 PSI off), 12 ft of 1/4" air line, push button switch, all necessary tank fittings and mounting hardware Free Wiring Kit!