Butterfly G40+ 3 Star Table Tennis Balls PROFESSIONAL TABLE TENNIS BALLS: Approved by ITTF and USTTA for top level tournament play GREAT BOUNCE: The perfectly round G40+ table tennis balls are regulation size (40mm) and are the same thickness on all sides creating a very consistent bounce PLASTIC BALL: The poly table tennis balls closely resembles the bounce of traditional celluloid table tennis balls OFFICIAL TOURNAMENT BALL: The Butterfly G40+ table tennis balls are the Official Ball Sponsor of the Butterfly Canada Cup 2015-2018 and Butterfly sponsored tournaments in North America BUTTERFLY G40+: The Butterfly G40+ is made in Germany