Heritage pocket balls are designed for daily use. Made with high-quality phenolic resin, Heritage balls are ground and polished to radial tolerances of 0.003 of an inch, for accurate, reliable performance. Made with high-quality phenolic resin. Brunswick warrants that its Heritage billiards balls will be free from defects in materials and workmanship for the life of the balls, as long as the balls are owned by the original Owner. All components are solid cast and vitrified, or heat fused for a homogeneous molecular bond. Heritage balls feature bright white and colour components and standard numbering style.