If you’ve ever wondered how the pool table knows the difference between the numbered balls and the cue ball? Irving Kaye tables use an over-sized cue ball upon scratching the cue ball runs along the same track as the numbered balls until they get to the cue ball separator. There is an attached ball shunt. The shunt is set to a height of just over 2.25 inches allowing the numbered balls to pass under. The over-sized (2.375 inch) cue ball cannot pass under the shunt, makes a hairpin turn and drops to a track leading to the head of the pool table.