Jumbo Improved Atomic Ball by Nick De Palma

Beautifully made prop by Nick De Palma.  The magician shows a wooden box containing 2 Brass Rings, 2 Dice and a Small Ball Bearing.  One of the rings is placed on the box, a die is placed inside, the ball is placed on the die, the second ring is stacked on top and the second die is placed in it.  Just a tap and the top die drops flush, the ball vanished from in between the two die and appears back inside of the box

The box is 5.5×4 inches and the dice 7/8 inch.