This 150 PSI kit is designed for large applications, whether it be full-size train horns or heavy use for air tools, tire inflation, or any other mobile air application, this is the ultimate kit. Unlike some other air systems, HornAir kits come with 10 and 18 gauge wire, and a complete wiring kit including a fuse holder. This takes out the guesswork on your end and makes sure your system is installed correctly.This package is perfect for filling upload leveling air springs. If your truck has air springs without a compressor setup, this is the perfect compliment. Please note that if you use horns, you will still need an air valve kit to connect the system properly. Another great feature of HornAir systems is that they come with a standard 1/2" OD push-to-pull fitting. This means the horns you hook up with get all the air they need.