Vixen Horns 5 Gallon (18 Liter) 8 Ports Train/Air Horn Tank System/Kit 200 PSI with Gauge,Pressure Switch,Drain and Safety Valve,Compression Fitting,Male Plug,Hose,Thread Sealant VXT5000 Capacity: 5 Gallon (18 Liter) Pressure Rating: 200 PSI Ports: 6 x &frac14; inch NPT, 2 x &frac12; inch NPT 240 PSI Air Pressure Gauge 170-200 PSI Pressure Switch 250 PSI Safety Valve 1/4&#034; NPT Wing Style Drain Valve 1/4&#034; NPT Compression Fitting for 1/4&#034; OD Air Line 1/4&#034; NPT Hex Head Male Plug 1/2&#034; NPT Hex Head Male Plug (2) 1/4&#034; OD Nylon Plastic Hose (6 Feet) Thread Sealant Tape Mounting Hardware