Ivation Balance Exercise Ball Chair &ndash; Office-Size 60mm/2.5" Wheels &ndash; Starter Pump & Bonus Latex Resistance Band Included Innovative Ball Chair Created by Leading Health Experts Improves Back & Posture Inflated Design Builds Healthier Back, Aligns Spine & Relieves Back & Lumbar Pain Proper Office Height is Suited for Users 5 to 511  Supports 300 Pounds Maximum Included Starter Pump Rapidly Inflates Ball Without Any Strenuous Mouth Inflation Removable Ball & BONUS Resistance Band Are Perfect for Many Popular Exercises