Kleinn Automotive Air Horns GMTRK4XTREME Air Horn KitAir Horn Kit Train Horn And Onboard Air System w Horn Train Horn And Onboard Air System w Horn; Incl. Model 220 Train Horn; Black Horn 150 PSI Air Sytem; SPECIFICATIONS: WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www. P65Warnings. ca. gov FEATURES: 3