This OBA Accessory Hook Up Kit custom designed to work with VIAIR High Performance Compressors (VMS), it has everything you’ll need to install VIAIR single or dual compressors to your vehicle which includes a 200PSI Pressure switch, wiring harness with relays, and inline fuse, VIAIR Rocker Switch, 8-Port Manifold with (2) 1/8 BSP ports, Pro Series Air relocation kit and all of the fittings needed. Steel “L” Bracket w/ Mounting Hardware – 15 ft. Air Line Tubing 3/8 O. 1/4? NPT (M) Automatic Quick Connect Coupler w/ VIAIR® Dust Cap – Bulkhead Union – PTC 90-deg Swivel Elbow Fitting – PTC Straight Fitting. 10 Gauge TXL Automotive Wire (12ft). Micro Relay – 8-Port Manifold – Heavy Duty Pressure Switch – 1/4 Safety Valve – VIAIR Rocker switch w/ Blue LED light indicator and harness.