Made with premium-grade phenolic resin, Brunswick Centennial balls are ground and polished to exacting radial tolerances of 0.001 of an inch for an absolutely true and accurate roll. Components are solid cast and heat fused for a homogeneous bond between every single molecule. With resiliency and balance that allows hairline accuracy, and with numbers and colors that will not rub off, spot or fade, Centennial balls are superior in both playing quality and appearance to any other ball set on the market. And, as the official billiards ball set of the WPBA, turn on an ESPN Women's Pro Tour event and you'll see these stunning Billiards balls.