The Measle Ball has quickly become one of the preferred cue balls to use for home, league, and tournament play in pubs and pool halls around the world. Standard weight, diameter, and roundness tolerance combines with six dot spin (rotation) indicators to provide not only tactile feedback but also visual evaluation and confirmation of where the cue ball was hit, with what force, and in what direction. Not just a training ball, it can and should be used on every shot to train the shooter in all aspects of cue ball impact and, more importantly, cue ball control. Features:Regulation weight: 6 ozRegulation diameter: 2.25Six black dot spin indicators Formed from polyester resinChip and Ding ResistantDetails:Ball type: Cue ballMaterial: Polyester ResinIndividual weight: 6 ozChip and Ding ResistantRoundness tolerance: .005