Photo 1 of Gaiam Ultimate Balance Ball Chair (Standard or Swivel Base Option) - Premium Exercise Stability Yoga Ball Ergonomic Chair for Home and Office Desk - 52cm Anti-Burst Ball, Air Pump, Exercise Guide Standard Base (Black)

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Photo 1 of Gaiam Ultimate Balance Ball Chair (Standard or Swivel Base Option) - Premium Exercise Stability Yoga Ball Ergonomic Chair for Home and Office Desk - 52cm Anti-Burst Ball, Air Pump, Exercise Guide Standard Base (Black)Photo 2 of Gaiam Ultimate Balance Ball Chair (Standard or Swivel Base Option) - Premium Exercise Stability Yoga Ball Ergonomic Chair for Home and Office Desk - 52cm Anti-Burst Ball, Air Pump, Exercise Guide Standard Base (Black)