?Welcome To Our Brand Store Vunexo.....? Hopper balls of Vunexo use premium and thicked materials with good flexible,stronger and more durable than poor-quality bouncy balls.Our hopper balls can keep the air well without a leak, the kids can bounce on it for a longer time.?Outdoor & Indoor toys for kidsKids can bounce on it in the room without the noise or in the backyard when the sunshine,it also is suitable for kids school game. Parents also can carry it for short travel for kids because of its lightweight.Have Good Fun with Family or Friends!Choose the hopper balls of different sizes, start a fun family game or join a party game, bounce on it together with friends, brothers and sisters,enjoy the time together.?Keep kid's Energy Out!Riding hopper balls can keep kids active and maintain exercise, help kids develop balance and eye-coordination. bouncing on it can bring kids much fun, let kids pass a boring time even in the rain.?Product Information:Size:50cm/20inch,55cm/22inchWeight: 20inch:0.7kg;  22inch:08kg.Age:20inch for 7-9 Years,22inch for 10-12YearsMaximum sustainable weight of 160 pounds or 70 kgs?FQA 1:Ball size is smaller than advertised.A: The ball is made of rubber which will become much contracted being packed tightly into the box. Thus, keep pumping to stretch the rubber is the key. If it is hard to reach the suggested ball size during 1st inflation, users can leave the ball as it is for a day, and then pump again after the material gets fully stretched.?Tips:Keep away from sharp objects?If there are any missing/ faulty accessories, please “Contact Seller” directly (other than Amazon-Customer-Service) from Amazon Buyer Central, send us an order number for a replacement.