The Olloid Symmetric core is designed to give this ball more length while maintaining energy and creating more hook potential down the lane

high mass bias Savage core

Works on all types of bowling balls

and FlexLite Technology for flexibility and cushioning

900Global Clear Poly Black Bowling Ball heel The Olloid Symmetric core isThe 900Global Clear Poly Black ball is the spare ball you need and can trust. This ball is ideal when you need a straight ball, when shooting spares, or when facing tough dry conditions. Color: Black Clear Coat All colors do vary somewhat from the picture shown Coverstock: Polyester Plastic Core: Traditional 3 Piece Symmetric Finish: 1,500 Grit Polished Recommended Lane Condition: Any RG: 2. 69 (for 15# ball) Differential: 0. 006 (for 15# ball)