A wooden tube is shown, along with two brass bolts and a steel ball. The performer threads both bolts through the holes in the sides of the tube and secures them with the nuts. The spectator then drops a ball into the tube and verify for himself that the bolts are preventing a ball from travelling through the tube. On the performer's command, a ball magically penetrates both bolts and falls out the bottom! The tube can be examined. Includes instructions. Excellent condition.