Balance Board

*Size : 45 x 15 CM
*This 45CM Diameter Balance Cushion which provides more
  widely range performance when you workout on it such as
  single leg balance,crunch,reverse crunch or calf raise etc.
*You can experience better stability than other Balance Cushion.
*Work your core muscles with inflatable Balance Disc.
*The Balance Disc engages your core muscles while sitting
  and can also be used for strengthening exercises in your chair
  or on the floor.
*By controlling the firmness of the cushion,you can adapt it to
  your fitness needs and sitting comfort.