2 Black 580 Compressors For Air Ride Suspension. 120 psi On 150 psi Off Pressure Switch Includes: 2 – airmaxxx Black 580 Air Compressors 2 – 22″ Long Stainless Steel Braided 3/8″ Leader Hose 2 – 3/8NPT Check Valve Pressure Switch 120 psi on / 150 psi Off 2 – 40 Amp Premium Relays.