Photo 1 of Standing Desk Mat Balance Board with Rollerball, Anti Fatigue Wooden Wobble Ergonomic Design, Office Comfort Floor Mat to Relieve Foot, Knee, and Back Pain, Non-Slip Bottom (Medium, 20.87" x 13.39")

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Photo 1 of Standing Desk Mat Balance Board with Rollerball, Anti Fatigue Wooden Wobble Ergonomic Design, Office Comfort Floor Mat to Relieve Foot, Knee, and Back Pain, Non-Slip Bottom (Medium, 20.87" x 13.39") Photo 2 of Standing Desk Mat Balance Board with Rollerball, Anti Fatigue Wooden Wobble Ergonomic Design, Office Comfort Floor Mat to Relieve Foot, Knee, and Back Pain, Non-Slip Bottom (Medium, 20.87" x 13.39")