These black rubber hand shapes are forms used in the construction of Apollo pressure gloves. They were made from a cast of the astronaut's hands, and were inserted into a nylon glove and then dipped in a rubber/neoprene compound. The result of the dipping process became the interior pressure bladder of both intra-vehicular and extra-vehicular gloves used during the Apollo program.
This form was made using a model of astronaut James Lovell's left hand, and ILC Industries transferred it and its mate to the museum in 1973.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.