Leapair Exercise Ball for Stability and Balance with Air Pump (25-Inch, Purple) Strengthen and tone your core and other muscle groups with this 25-inch ball to help develop better balance and coordination Durable and thick PVC construction provides grip, softness, and is easy to clean Inflate this ball with the included foot pump to your desired firmness and use with yoga or other exercises Available in blue, purple, red, and silver, this ball coordinates with almost any gym or exercise room color scheme Each box includes on exercise ball with foot pump