I am currently using this on Hadley Ambassador air horns. My factory Hadley compressor failed so I upgraded it to a better compressor and combined the tanks into a 3 gallon tank. Fills three gallons from empty at 150psi in approximately 3 minutes 48 seconds. Just be careful where you install the compressor, the handle/head/metal plated air line will be very hot. They offer a large number of air lines and fittings. I found that the number of wires from my driver's side battery to under the back seat in the F 250 was insufficient for a switch and separate battery supply. 4+ years still work great, more impressed with the compressor switch tag, it's a little weak, just melted, but only 8 bucks, I'll consider it a portable item, used frequently.