Low-Back Deluxe Ball Chair
35955 Features: -Ergonomic seating combines the benefits of exercise fitness ball and the rolling base.-Promotes active sitting while strengthening the back and improving posture.-Great alternative to traditional chair for both office and leisure.-Compact, lightweight and easy to transport.-Steel frame.-Chair height is fixed, not adjustable.-Casters do not have a locking mechanism.-Weight capacity: Ball in Chair - 300 lbs , Ball Alone - 1250 lbs.-First pre-assemble the chair without screws.-Once assembled, loosely put each screw in and turn it one or two turns.-Once all screws are inserted, tighten all the screws half way then go back and tighten all the screws again.-NOTE: If one screw is tightened completely before the others, some of the pieces might not align properly and the last screw may not fit.-Ball should be filled between 45cm to 50cm diameter; with 48cm being the best diameter. Measure the diameter from the North Pole to the South Pole with a tape measure or a string that is marked in Centimeters. This would be from where you fill the ball on the top to the bottom and you will see where the point should be by the center of the smallest circle. If the ball does not get to 45cm, let it sit for at least 24 hours then continue to fill again. Includes: -Ball and hand pump included.-Casters included. Color/Finish: -Color: Black. Dimensions: -Arm height: 25'' from floor.-Ball: 22'' H.-Overall dimensions: 22'' H x 22'' W x 31'' D.-Product weight: 20 lbs.