B00LCYUXM8 Gamma Beginner Child or Adult Training (Transition) Practice Tennis Balls: Orange 60 or Green 78 Dot (25%-50% Slower Ball Speed) – 12, 36, 48, 60 Pack Sizes

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25% SLOWER: Featuring a low-compression core, these tennis balls fly 25% slower and have a lower bounce than standard tennis balls, making it easier for players to get into position to hit better shots during practices and games.
TRAINING TENNIS BALLS: Instructors can use these balls to build tennis skills with children as well as adult beginners. These low bounce tennis balls are great for use in drills to improve technique and control with volleys, serves and ground strokes.
HI-VIS YELLOW FELT: The yellow felt surface and large green dot make these tournament/practice tennis balls highly visible and easy to identify from standard tennis balls.
MADE FOR 78′ COURTS: Designed for players transitioning from 60′ to 78′ courts, these training tennis balls are great for practicing full court play as well as being used for competitive tournaments for young players.

MEET USTA/ITF STAGE 1 SPECIFICATIONS: These tennis balls have been tested and meet all Stage 1 specifications outlined by the USTA and ITF for use in 10 and Under tennis tournaments.