【High-Quality Rubber Construction】 Kenko Ball's J-ball is made of durable rubber material, ensuring it can withstand long hours of use. 【Officially Certified Ball】 This is an official ball certified by the Japan Amateur Baseball Association, boasting reliable quality. 【For Elementary School Students】 With its size and weight, it's perfectly suited for elementary school players, making it ideal for learning the fundamentals of baseball. - Brand: Kenko Ball - Model: J-ball - Quantity: Pack of 12 - Material: Rubber - Size: Approximately 9.5cm in diameter - Made in Japan Thank you for viewing.