Photo 1 of Gamma Quick Kids (Transition) Practice Tennis Balls: Red 36, Orange 60, or Green 78 Dot (25%-50% Slower Ball Speed) - 12, 36, 48, 60 Pack Sizes Balls 12 Balls Quick Kids 60 (50% Slower Speeds)

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Photo 1 of Gamma Quick Kids (Transition) Practice Tennis Balls: Red 36, Orange 60, or Green 78 Dot (25%-50% Slower Ball Speed) - 12, 36, 48, 60 Pack Sizes Balls 12 Balls Quick Kids 60 (50% Slower Speeds)