Only at OPTP, the 'emerald green' Franklin Textured Ball™ Set sports a new design and texture* that activate the relaxation reflexes of the muscles. Designed to facilitate the exercises of the Franklin Method®. Balls are the ideal density and size for relaxation exercises of the neck, jaw, elbow, hip and more. Approximately 3.5" in diameter. Latex- and phthalate-free. *People with known sensitivities may want to consider using the (orange) Smooth Franklin Ball Set when performing the Franklin Method exercises. UPC: 04023215868..