Photo 1 of **ball has a hole ** Gaiam Classic Balance Ball Chair – Exercise Stability Yoga Ball Premium Ergonomic Chair for Home and Office Desk with Air Pump

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Photo 1 of **ball has a hole ** Gaiam Classic Balance Ball Chair – Exercise Stability Yoga Ball Premium Ergonomic Chair for Home and Office Desk with Air Pump Photo 2 of **ball has a hole ** Gaiam Classic Balance Ball Chair – Exercise Stability Yoga Ball Premium Ergonomic Chair for Home and Office Desk with Air Pump Photo 3 of **ball has a hole ** Gaiam Classic Balance Ball Chair – Exercise Stability Yoga Ball Premium Ergonomic Chair for Home and Office Desk with Air Pump