The Heavy-Duty Portable Tetherball Set with Square Design is a durable and versatile backyard game that is suitable for both adults and kids. Made from high-quality materials such as fabric, metal, nylon, plastic, and rubber, this tetherball set is designed for easy assembly and storage. With a square design and manual operation mode, this tetherball set does not require batteries and is easy to transport at 9.14 kilograms. Perfect for outdoor sports activities, this tetherball set is a fun and interactive way to engage in a game of tetherball in your backyard.