Quest Joint Airlock
Prior to the installation of the airlock, spacewalks could only be performed when a shuttle was docked to the station. The new airlock will permit independent spacewalks and accommodates either Russian or American spacesuits.
Length: 5.5 meters (18 ft.)
Diameter: 4 meters (13 ft.)
Weight: 6,064 kilograms (13,368 lbs.)
Volume: 34 cubic meters (1,200 cu ft.)
Cost: $164 million, including tanks