Tank Capacity: 3 gallon;Ports: Seven (7) 1/4" NPT;All steel construction, manufactured to SAE J10 and FMVSS 121 standards;Cortec? Internally Coated for Corrosion Resistance;Black epoxy finish. Replacement 3.0 gallon, 7-port air tank for VELO-230, VELO-730.3 Gallon Air Tank for Veloci-Raptor? 230/730 Kits.Replacement air tank for VELO-230 and VELO-730 Train Horn Systems.3 Gallon Air Tank.Portable Air Tank.3 Gallon Air Tank. This product ships in approximately 1 days