Half-dome balls functions similar to both a vestibular board and ball. Ball can be inflated or deflated to adjust difficulty level. There are various models available.
Versatile balance trainer which can be used as a ball or board. You can inflate the ball to change instability; 25" diameter.
Dimensions: 25" x 11" x 25"
Weight: 17.0 lbs
Notice: Typically ships in 1-2 days.