<Details> Quantity: Set of 30 Size: Approximately 42mm *Please note that there may be slight variations due to manual measurement. Material: Polyethylene Color: Green <Product Description> Hole-drilled balls perfect for golf and batting practice. A set of 30, so you can use plenty! Great for putting, approach shots, toss batting, and tee batting practice! The hole-drilled structure increases air resistance, which helps to limit the distance the ball travels. This allows for effective practice in a smaller space! Suitable for outdoor use, as well as indoor use, garages, etc. Lightweight, so you're less likely to get injured! Because they are light and don't fly far, you can easily see the quality of your hits, making them the perfect item for improving your contact rate!