This ball is deadly! The AMF Ninja SE Pearl is part of their Vintage line of bowling balls. This ball features the Shredder symmetric core that is covered with an F70 pearl coverstock and is finished with a 1500 grit polish. This combination provides a great option for lane transitions or breakdown. The Pearl version of this ball is clean through the fronts while retaining power for the backend motion. This ball is ideal on medium to medium heavy oil conditions.