Resistor top: 2 1/2 in x 5/8 in x 5/8 in; overall: 10 in x 6 in x 4 1/4 in
The record contains a bag of circuit bottles for use with the TX-0/TX-2. The top is a cylinder with threading on the bottom, so that the circuit plug screws in. The top has a flattened circular nub for removal. One of the tubes is marked at the top with a black pencil "X".