These cleaning pads fit the older style machine. The Ball Star polishing pad is the round pad located in the bottom of the Ball Star cleaning machine. These pads do need replacement from time to time. This set of three pads will restore the cleaning ability of your Ball Star cleaner. Replacement is a breeze! The Ball Star Automatic Billiard Ball Cleaner is the best way to keep your pool balls looking new, and to reduce wear on your pool table cloth. The diameter of this pad is 9.5".