Features: - 40mm 3-star balls, suitable for practice play. - Material: Ball: Celluloid, canister: PE. - The balls are very tough, offer a very good feeling when you hit the ball. - Durable have consistent weight ( 2.6 - 2.7g / pcs ) and bounce. - Washable, can wipe clean easily after it is dirty. - 60pcs in total, enough for you to use for a long time. - Suitable for both recreational players and professional players.