... Ingersoll Rand Ingersoll-Rand Portable Air Compressor P1IU-A9, Twin Stack, 2HP, 4.5 Gal Ingersoll Rand Portable Air CompressorLightweight, compact design makes ... approved. Measures 21"L x 15"W x 17"H. 1 Year Limited Warranty. Includes 2 pints of compressor oil. ... @ 100 PSI4.3 Ingersoll-Rand Portable Air Compressor P1IU-A9, Twin StaIngersoll-Rand Portable Air Compressor P1IU-A9, Twin Stack, 2HP, 4 ...