MPC Giant Quad Train Horn Kit for Trucks & Cars. [Complete Kit] 4 Chrome Train Horn Trumpets, 12 Volt 200 PSI Air System with 100% Duty Cycle Air Compressor & 5 Gal Tank & Fittings - Real Deal! [HORNS] 4-Trumpet Full Sized Train Horns w/ 12-volt Air Solenoid [AIR SYSTEM] 200 PSI Heavy Duty Air Compressor & 110/145 PSI Pressure Switch [AIR STORAGE] 5 Gallon Black Finished Air Tank (Dimensions: 30" L x 6.5" W x 8" H (Including Bracket)), 5 total ports (3 x 1/4", 1 x 3/8", 1 x 1/2") [ACCESSORIES] Brass air tank fittings, push-button switch, 1/4" O.D. nylon air tube [BONUS] Free Wiring Kit