Anti-burst Gym Ball,YB-01 Made of PVC Fashion,Portable,Effective Diameter 45cm,55cm,65cm,75cm,85cm M. ... O.Q.:3000pcs This workout shows a variety of yoga-based poses using an exercise ball ... you improve balance and flexibility. The stability ball is a great way to get extra ... 2)Diameter:45cm,55cm,65cm,75cm,85cm3)Ball+Hand Pump+Ball Plug4)Package:1pcs/OPP Bag or Box Anti-burst Gym Ball