This medium sized unit is suitable for hand, elbow, foot and ankle rehabilitation. Very portable and folds in seconds to just 37 x 48 x 1cm (14 1/2" x 19" x 3/8"). Used for many conditions including phantom limb pain and Complex Regional Pain Syndrome (CRPS) also known as RSD or Sudeks Atrophy as will as for stroke rehabilitation and rehab after an injury or surgery.