2 Hp 120V,Twin Stack 4.5gal,horizontal Portable type Ingersoll Rand Ingersoll-Rand Portable Air Compressor P1IU-A9, Twin Stack, 2HP, 4 ... . Includes twin 4-1/2 gallon air tanks with independent quick connectors to run multiple tools, oil-lube cast iron ... Number634158CFM @ 100 PSI4.3 Ingersoll-Rand Portable Air Compressor P1IU-A9, Twin StaIngersoll-Rand Portable Air Compressor P1IU-A9, Twin Stack, 2HP, ...