The Brunswick Prism Solid high performance bowling ball helps introduce the Portal core which has a very low RG with a high differential and intermediate differential. This core features Brunswicks DynamiCore and DOT technology. This core is covered with Activator Composite Technology (ACT) and then finished with 360 grit and then up to 2000 grit. With its increased traction this bowling ball offers major hook potential as well as continuation when facing high volumes of oil.