SpaceX CRS-12, also known as SpX-12, is a Commercial Resupply Services mission to the ISS launched on 14 August 2017. The mission was contracted by NASA and was flown by SpaceX using a new Dragon capsule. The Falcon 9 rocket's reusable first stage performed a controlled landing on Landing Zone 1 (LZ1) at Cape Canaveral Air Force Station.  After delivering more than 6,400 pounds of cargo, the SpaceX Dragon cargo spacecraft is tentatively scheduled to depart the ISS on Sunday, 17 September 2017, and return to Earth.

CRS-12 is the last of the original order of twelve missions awarded to SpaceX under the CRS contract.

The following is a breakdown of cargo bound for the ISS:

• Science investigations: 916 kg (2,019 lb)
• Crew supplies: 220 kg (485 lb)
• Vehicle hardware: 339 kg (747 lb)
• Spacewalk equipment: 30 kg (66 lb)
• Computer resources: 53 kg (117 lb)
• External payloads:
  • Cosmic-Ray Energetics and Mass (CREAM): 1,258 kg (2,773 lb)

Approximately 4” Diameter