Have the most unique sound on the road with the Dolphin horn. The specially engineered middle chamber creates a repetitive sound to give this horn a different but attention grabbing sound. This kit comes complete with a compact but powerful 1.5 gallon/ 120 psi air source unit. The horn comes in a beautiful black finish, mounting hardware and is ready to acceptlarge half inch. This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.