Bowling balls with exclusive 360 degree, limited edition graphics. At the bowling center or on display in your home or office, there's nothing cooler than a Viz-A-Ball. Real bowling balls designed with your favorite images. This ball glows under the black light. Cover stock: Plastic/Polyester Ball Finish: High-Gloss Polish Hook Potential: 25 Low Recommended Lane Conditions: Any Patterns may not align perfectly