Pressure Switch 90/120 PSI 12-Volt for Air Train Horn, Air Ride

Heavy Duty Air Pressure Switch Works on 12 and 24 Volt DC Compressors Automatically controls air compressor to regulate pressure in air tank 90 PSI on, 120 PSI off 1/4 Male NPT thread 20 amp rated Tested for 12,000 cycles Great for air horn and air suspension applications Instructions included Free Bonus Relay included! We are now including a 30/40 amp relay and wiring pigtail ($7.50 value) FREE! The relay is required for compressors that draw over 20 amps, but even if you have a smaller compressor, it will save wear and tear on the pressure switch and extend it's life. We're giving it to you for free...might as well use it! California residents: Click here for Proposition 65 warning Product may not work in vehicles manufactured for sale outside of U.S. & Canada.