... 1,PVC gymball and PP base 2,The combination with strap make it easy to play. 3,balance ball Gym ball ... with strap, Balance ballFeatures:1) Product name: Balance ball2) Ball made of ... to load up to 600 lbs; 4) The combination with strap make it perfect for core stability, rehab, also easy for ... in indoors or outdoors;8)Packing:2pcs/ctn ball with strap gymball with ...