Big Rig Sound - [2] 29" Roof Mount Horns with Chrome Finish for Trucks. [Complete Kit] 12 Volt 200 PSI Air System with 100% Duty Cycle Air Compressor & 5 Gal Air Tank & Fittings - The Real Deal! [HORNS] Dual 29" Roof Mount Truck Horns w/ Two 12-volt Solenoids [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