Xiom Seamless Three Star Plastic Poly Table Tennis Ball - 9 Pack The Xiom Seamless Plastic 3 Star New Plastic Ball is designed for tournament play and for international competition. It is ITTF Approved and in manufactured without seems. The ball is new and is designed to comply for the International Table Tennis Federation requirements for a non-celluloid poly ball. Made in China. Made of plastic material. Packaged in geometric 9 pack box. Available in white only. The Xiom star ball is slightly larger than traditional 40 mm ball as manufacturing tolerances with plastic verses celluloid enable manufacturers to get much closer to the 40mm specification. It is also made of hard plastic and is durable and has a firm bounce. The New Plastic Ball will now be used in all international competitions that are sanctioned by the International Table Tennis Federation. USA Table Tennis and other National Federations have yet to mandate the new plastic ball as a requirement for tournament play. As a consequence, tournament directors currently have the option of using the traditional celluloid ball or the new plastic ball for upcoming tournaments. The existing celluloid ball is also a plastic compound, but is flammable. The new plastic ball is more environmentally friendly. Celluloid was once a widely used industrial plastic, but it is no longer a common material. The new plastic should play similar to the old celluloid ball. It will be slightly larger, and slightly heavier but will move through the air, despite these changes at similar speeds to the celluloid ball.