The Slazenger™ Mini Tennis Orange ball is an ITF Approved Stage 2 ball designed for beginners of all ages on a slightly shorter than full-length court. The ball is approximately 50% slower than a standard tennis ball with a lower compression and bounce making the ball easier to hit. At 50% compression, the stage 2 balls are for beginners who have mastered and upgraded from the Red Stage 3 tennis balls. Suitable for all playing surfaces. High-Vis fabric. ITF Approved Stage 2. Ideal for training kids aged 8-10 years old before moving on to Stage 1 Tennis Balls. Easy to transport and store the tennis balls thanks to the convenient carry-bucket.