Safco Products Zenergy Ball Chair , Black, Low Profile, Active Seating, Steel Legs HELPS KEEP YOUR BODY MOVING. Safco Zenergy Ball Chair provides an active seating experience that encourages good posture, core muscle strength and may help increase concentration. ENCOURAGES BETTER POSTURE. Designed with four powder coated legs and stationary glides for stability and durability, it offers the posture benefits of a yoga ball without the rolling. These benefits may include better balance and concentration.Seat Height: 23 inches LOW PROFILE DESIGN. Weighing only 15 lbs., this ball chair moves easily from place to place. Anti-burst ball design supports up to 250 lbs. Its low profile allows it to fit neatly under work surfaces when not in use. GREENGUARD Certified products are scientifically proven to meet some of the worlds most rigorous, third-party chemical emissions standardshelping reduce indoor air pollution and the risk of chemical exposure to help create healthier indoor environments. PRODUCT DIMENSIONS. Overall dimensions: 23"H x 22 1/2"D x 22 1/2"W. Weight capacity: 250 lbs. Pump included with ball chair.