2 Air Suspension Compressors. Pressure Switch & Relays. See Pictures For Install Instructions. 2 – Chrome AM400 Compressors. 2 – 22″ Long Stainless Steel Braided 1/4″ Leader Hoses. 2 – 1/4NPT Inline Check Valves. 120 On / 150 Off Pressure Switch. 2 – 40 Amp Relays. Want to upgrade your kit?