The Head TIP Green allows players to hit a faultless shot. It is ideal for adults just starting out or great practice balls for 9 to 10-year-olds. It is softer, bigger, and 25% slower than a standard tennis ball, which increases the reaction time and makes hitting the ball a lot easier. In addition, its green and yellow two-tone felt make the ball easier to see for kids. This product contains 72 balls in total.