Gaiam Ultimate Balance Ball Chair Standard or Swivel Base Option Premium Exercise Stability Yoga Ball Ergonomic Chair for Home and Office Desk 52cm AntiBurst Ball Air Pump Exercise Guide

ALTERNATIVE DESK CHAIR: Featuring a new and improved modern design and construction with a durable swivel base, combining both comfort and ergonomic back support to alleviate the stress and pains that come with sitting for extended periods of time., SWIVEL BASE: Gaiam Ultimate Balance Ball Chair is now available with a swivel base, so you can make the most out of your workspace by moving around your desk and office with ease, BOOST ENERGY LEVELS: Engages the core, aligns the spine and helps increase energy levels for a more productive and energetic day, RECOMMENDED USER HEIGHT: Designed for users 5' to 5'11" tall and fits most standard-height desks. 300-pound weight capacity., INCLUDES: Removable 52-centimeter exercise ball, an easy-inflation air pump, 5 easy-glide lockable casters and a desktop guide that illustrates multiple stretching and strengthening exercises to help you stay active.INFLATION INSTRUCTIONS: It may be necessary to re-inflate the ball after initial inflation to allow the ball's material to stretch to its final size. Inflate ball with air, let stand for 24 hours, deflate 50% then fill again to 52cm height.