The Z1 segment now houses the Ku-band antennas and serves as a routing point for power and data cables on the exterior of the ISS. The Integrated Truss Structure is made from stainless steel, titanium and aluminum. It spans approximately 110 meters long and houses four sets of solar arrays. Each set of solar arrays contains four arrays for a total of 16 solar arrays. Each of the four sets of arrays also has an associated cooling system and radiator for cooling the power supply equipment. The Integrated Truss Structure also houses the main cooling system for the ISS, which consists of two pumps, two radiator arrays, and two ammonia and two nitrogen tank assemblies. There are also several payload attachment points located on the Integrated Truss Structure. These points host the External Stowage Platforms, External Logistics Carriers, Alpha Magnetic Spectrometer and the Mobile Base System for the Canadarm2. The Z1 truss was delivered by the STS-92 mission in October 2000. The P6 segment was installed on STS-97 in December 2000. The S0 truss was delivered to the ISS on STS-110, with the S1 segment following on STS-112. The P1 segment of the truss was brought to the ISS by STS-113, followed by the P3/P4 segment on STS-115, and the P5 segment on STS-116. The S3/S4 truss segment was delivered by STS-117, followed by the S5 segment STS-118. The last component of the truss segment, the S6 segment, was delivered by STS-119. The External Stowage Platforms (ESP), are a series of platforms that are used to store Orbital Replacement Units (ORU) on the ISS. The ESP's provide power to the ORU's but do not allow command and data handling. External Stowage Platform 1 is located on the port side of the "Destiny" lab and was delivered on the STS-102 mission in March 2001. ESP-2 is located on the port side of the "Quest" airlock, and was brought to the ISS by the STS-114 crew in 2005. ESP-3 is located on the Starboard 3 (S3) truss segment and was delivered to the ISS on the STS-118 mission in August 2007. The ExPRESS logistics carriers (ELCs) are similar to the External Stowage Platform, but designed to carry more cargo.