The Integrated Truss Structure (ITS) of the International Space Station (ISS) consists of a linear arranged sequence of connected trusses on which various unpressurized components are mounted such as logistics carriers, radiators, solar arrays, and other equipment. It supplies the ISS with a bus architecture. It is approximately 110 metres long, weighs slightly under 118 tonnes (260,000 lb) with all its attached equipment, and is made primarily from aluminium and stainless steel.