The size of the ball is 45 cm. and it can carry weights of up to 700 Lbs. The warranty is for 30 days from the time of purchase. Sometimes referred to as the ergonomic ball chair, ergo ball chair, swiss egg chair, ergonomic office chair, ergodynamic chair or ErgoChair, our Ergonomic home and office chair was designed in Switzerland by a group of engineers, doctors and physical therapists utilizing the benefits of the exercise ball and we are so sure you will love it that it comes with a 30 day money back guarantee. The Ergo Chair - ergonomic chair has claimed great success throughout the European community in rehabilitation centers, hospitals and physical therapy clinics and is now a patented ergonomic chair and introduced in the U.S. for the first time by us. The ErgoChair is a simple yet ingenious ergonomic office chair that allows the body to sit up correctly thus strengthening abdominal muscles, relieving tensions in the neck area and making hours of sitting more natural and comfortable. Anyone who sits at a desk for hours; students, home office workers, computer professionals, individuals with back and neck problems and even children who need to be encouraged to assume a more correct posture. The possibilities are endless. This new system of sitting in our ergonomic ball chair is good for just about anybody. The ErgoChair is a simple breakthrough. Being in an office chair for hours can be a good thing. This revolutionary new method of sitting will change yourlife. the chair comes complete and the egg ball can be taken out and uses as an exercise ball. The height of the seat is adjustable by inflating or deflating the ball with the hand pump attached. The range is 17" to 24"
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