This is an unflown Model Rocket Industries A.8-2 model rocket motor. The "A.8-2" signifies that the power of the motor is in the lowest class (out of seven) established by the National Association of Rocketry. It is made of pasteboard and contains non-explosive propellant. A motor is used only once to power a model rocket.
G. Harry Stine, a pioneer in the field of flying rocket models, donated it to NASM in 1973.
Gift of G. Harry Stine