STS-120 delivered launch package 10A to the International Space Station (ISS). It consisted of the U.S. "Harmony" module (also known as Node 2), with four DC-to-DC Converter Unit (DDCU) racks and three Zero-g Storage Racks (ZSR) installed; a Power and Data Grapple Fixture (PDGF) for the station's robot arm, and a Shuttle Power Distribution Unit (SPDU). "Harmony" was manufactured for NASA by Thales Alenia Space in Torino, Italy, as part of an agreement between NASA and the European Space Agency and was the first pressurized habitable module delivered to the station since the "Pirs" docking compartment was installed in August 2001.