The wobble and rocker board can be used to strengthen and condition the lower back, improve ankle ROM, balance, body awareness and develop joint mobility and reaction skills. CanDo Balance Board Combo has handles/slots to add band or tubing. The board is durable, heavy-duty and non-skid yet lightweight and compact for portability. 15" x 18" wobble/rocker board, with 2 x 1" height, yellow MVP instability balls.