AIR TANK UNIVERSAL 7 NPT PORTS: 4 gallon features 7* NPT ports (3*NPT 1/4, 4*NPT 3/8) for flexible setup and expansion. With a 200 PSI rating, this air tank prevents accidental overpressure, ideal for air horns, suspension systems, tires, pneumatic tools, and other DIY or custom air projects. COMPLETE INSTALLATION PORTABLE AIR TANK KIT: All the essential accessories are included for a quick setup—air tank 4 gallon, drain valve, air hose, thread seal tape, and mounting hardware. Measuring 24.02" × 7.09" × 8.66" and weighing just 6.03kg, this compact air tank is easy to install, ideal for fixed installation.