This oil-less reciprocating compressors are the foundation for medical air systems. These amazing systems can run without any oil in the compressor. They come in several different sizes that range all the way from 1.0 HP to 30 HP. They are made in the following ways: simplex, duplex, tiplex, and quadrupled packages; all of these come in tank, base, and stack mount configurations. These systems are warrantied up to 12 months of service beginning or 18 moths from the ship date.