Features: Pack of 30pcs 3-star advanced training balls with good bounce, great for training, schools, beginners, table tennis robots. 30pcs 3-star advanced training balls in a box. 40mm diameter, good bounce and excellent spin. Suitable for multi-ball training, schools, beginners, table tennis robots, and other training balls. Specifications: Material: Plastic Colour: White / Orange (Optional) Diameter: 40mm / 1.6In Weight: Approx. 3G / 01Oz Package Size: 15.5 * 11Cm / 5.7 * 4.3In (D * H) Package Weight: Approx. 120G / 4.2Oz You will receive (per set): 30 x Table Tennis Balls