This case of small chambers may have been a training unit for a Skylab crystal growth experiment. It is marked "Non-Flight," and it includes a small wrench. Crystal growth experiments have been a staple of microgravity research. Without the influence of gravity, crystals form more flawlessly in space, making them desirable for electronics and pharmaceutical uses.
Transferred from NASA to the Museum in 1982.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.