Details: Quantity: Set of 30 Size: Approximately 42mm *Please note that there may be some errors due to amateur measurements. Material: Polyethylene Color: Green Product Description: Hole-in-one balls perfect for golf and batting practice. A set of 30 so you can use plenty! For practicing putting and approach shots, as well as toss batting and tee batting! The hole-in-one structure is designed to catch the air resistance, which helps to limit the distance of the ball's flight. This allows for effective practice in a small space! Great for outdoor use, as well as indoor use in rooms or garages. They are lightweight, making them safe and less likely to cause injury! Because they are light and don't fly far, it's easy to tell if you're hitting the ball well or not, making them a perfect item for practicing to improve your hitting accuracy!