Designed with an anti-burst exercise ball covered in mesh. Base is made of steel with 4 sturdy legs. Includes a pump for inflation when required. Available in your choice of colors. Overall dimensions: 22.5 diam. x 23H in. Think outside the chair with the Safco Zenergy Ball Chair. Enjoy the comfort and benefits of alternative sitting with this attractive ball chair. Improve posture and work that core while seated on a mesh covered yoga-style ball. Modern style legs keep it in place while its non-burst vinyl material provides an air-cushioned seat you'll enjoy all day long. Includes an easy to use pump when inflation is needed. Just pump it up, take a seat, and enjoy all the compliments, you'll get many. About Safco ProductsSafco products were specifically developed to meet the changing needs of the business world, offering real design without great expense. Each product is designed to fit the needs of individuals and the way they work, by enhancing comfort and meeting the modern needs of organization in the workplace. These products encourage work-area efficiency and ultimately, work-life efficiency: from schools and universities, to hospitals and clinics, from small offices and businesses to corporations and large institutions, airports, restaurants, and malls. Safco continues to offer new colors, new styles, and new solutions according to market trends and the ever-changing needs of business life. Color: Green.