Derkang Explosion-proof Thicken Fitness Ball / Adult Jumping Ball / Children Bouncing Ball / Lolo Ball / Rock N Hopper / Pogo Ball With Pump as Gift Ball sphere and ball plate are removable, so it doesn't stand space. For people of 6-50 years old, max load 100Kg. Ball plate is made from high-strength wear-resistant plastic, and the ball sphere is made from the highest quality PVC synthetic rubber. Ergonomically design, without any harm.