... 5gal,horizontal Portable type Ingersoll Rand Ingersoll-Rand Portable Air Compressor P1IU-A9, Twin Stack, 2HP, 4.5 Gal Ingersoll Rand ... so it can be powered easily. Includes twin 4-1/2 gallon air tanks with independent quick connectors to run ... Number634158CFM @ 100 PSI4.3 Ingersoll-Rand Portable Air Compressor P1IU-A9, Twin StaIngersoll-Rand Portable Air Compressor P1IU-A9, Twin Stack, 2HP, 4.5 Gal