Front view of the Expedite the Processing of Experiments to the Space Station EXPRESS Rack 2 with protective webbed cover installed. EXPRESS Rack 2 houses the Active Rack Isolation System ARIS. Within ARIS are the ARIS ISS Characterization Experiment ARIS-ICE, the Experiment of Physics of Colloids in Space EXPPCS, and the Zeolite Crystal Growth Furnace ZCG-FU. Photo was taken during Expedition Four in the Destiny U.S. Laboratory.