Practice hardballs made of high-durability PVC leather, perfect for toss batting and catch. - Quantity: 12 balls - Material: PVC leather - Diameter: 72.9-74.8mm - Weight: 140-145g - Uses: Toss batting, fielding practice, catch, etc. - Durability: Highly water-resistant, highly durable - Surface: Composite material of rubber, cork, and rubber I was doing toss batting indoors with a wooden bat. There is almost no dirt, but the shape has changed. I don't think it can be used for fielding practice. Thank you for looking.