Massage Gym Ball Material:Environmental PVC Common size:6/7. ... /10/55/65/75cm Weight :40g to1800g Various colour available Massage Gym Ball Features: 1) Material: PVC 2) Sizes: 6 ... SGS standards 6) Materials are safe for children Application 1)Massage therapy to relieve tension and relax muscles, promote circulation; ... legs,foot,hands, arms, and shoulders Available colour Small PVC Massage Gym Ball