Jack in the Box promotional Athletics antenna ball.

This is for 1 Athletics Jack in the Box antenna ball, a promotional item from the fast-food chain, designed to be placed on a car's antenna.  It is a collectible item, often sought after by enthusiasts.  This particular antenna ball is still in its original packaging.  The packaging indicates it was manufactured in China in 2002. The antenna ball is designed to fit on thin, standard-style car antennas.