Thick & Elastic PlasticThe durable vinyl material stays inflated and bouncy while kids hop and bounce almost anywhere. Two Sturdy HandlesTwo handles of Hopping Ball are more stable. These allows the kids to hold on securely. Children learn to coordinate their movements and find their balance while having fun! Manufacturered by YHSBUY. Inflation InstructionTake out the inserted white plug (air stopper) from hippity hop ball insert the tip of the pump and inflate the ball to good size and then replace the white plug back into the hole quickly. Bounce! Easy To UseThe YHSBUY Hopper Ball ships deflated but easily inflates with hand pump or electric pump (not included). Easy cleaning with a damp cloth. Perfect SizeYHSBUY bouncy ball could blow up to 18"/45CM. Space Hopper Ball is the right size to make exercise fun for kids ages 3 6. Maximum load 130 pounds.