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Spalding is proud to be the official basketball of the NBA for over 30 years. Spalding is also the official ball of The Big South, Colonial, ACC, Big Ten, NJCAA Tournaments, and the largest NFHS State Adopter in the nation. Designed for the competitive player, the All Conference Professional Basketball is the NBA Official Size and Weight (29.5") with concave channels for better feel and playability. This basketball is designed for indoor/outdoor play.