The top of each rocker balance board features an easy-grip surface that’s gentle on bare feet but helps keep you in place safely and securely This heavy-duty plywood balancing board is made with long-lasting strength and durability to hold kids and adults up to 350 lbs. The unique anti-slip pads provide great protection for your floor. At 17.5” x 13.5” x 3” in size, our lightweight balance exerciser / fit board can be used at therapy or training at home, the gym, or while traveling. A perfect standing desk accessory! Edge rounded design avoid hurting you while exercising at home,Which also helping your child stay away from injury. Upon you received it,you can use it directly.Also you can avoid the trouble of installation,and save a lot of time.