Strengthen and tone your core with the Natural Fitness Mini-Core Ball. This useful tool can be used in a wide variety of exercises to build strength and tone muscles. Our non-toxic/phthalate-free material is safer for the user and the environment. Approximately 8" diameter. Moss color. Kit includes: - 1 Mini-Core Ball - 1 Exercise Instruction Chart - 2 Inflation Tubes - 2 Plugs