YONEX Play & Stay Red Ball for 40 balls Low-pressure ball based on the ITF (International Tennis Federation) kids development program standards Play & Stay "Red Ball" ■ Ball Size • Diameter: Approximately 7-8cm • Larger than a standard tennis ball (approx. 6.5cm) • Highly visible and easy to hit ■ Features • Compared to a standard ball: Speed: Approximately 25% slower Bounce height: Approximately 25% lower • Bounces very low, suitable for children • Can be hit at the appropriate hitting point ▪️Product Condition Used approximately 10 times on an omni court over six months Used for one hour per session Used by elementary school students Never used in the rain ▪️Other Uses Besides Tennis Due to its larger size and low pressure compared to standard tennis balls, it can also be used for baseball toss batting and coordination training for ball sports ▪️Shipping & Packaging Recycled cardboard used