Kleinn's biggest and loudest train horn system equiped with a slim design 3-gallon air tank! The Demon(tm) Model 730's massive & detachable XCR 2.0(tm) spun steel trumpets (18.25", 14.75", 10.5") allow tons of installation options. Includes a high output 150 psi, 100% duty compressor, slim profile 3-gallon tank for easier installation and tire inflation kit with storage bag. Can power your horns as well as other accessories like air bags and small air tools. -For the clinically insane, the 730 can be upgraded by adding an Ultra BlastMaster(tm) valve upgrade (P/N 6890) - making it the loudest, largest and most aggressive train horn on the market. This product ships in approximately 1 days