DFX1017 Features: * Patented balance ball and ergonomic chair provides healthy, proactive sitting * Improving posture, reducing fatigue and building your core strength * Fit chair helps in relieving stress and strain on the spine and aids in eliminating repetitive motion injuries * Helps reduce, neck, back and shoulder pain * High quality burst-resistant ball * Constant adjustments you make while sitting on the chair helps build and strengthen your core muscles * Wheels with stoppers * Helps build core strength * Reduces fatigue * Improves posture * Provides proactive sitting * Chair back not included Includes: * Pump included Assembly Instructions: * No assembly required Dimensions: * Dimensions: 25"" H x 20"" W x 22"" D