MacGregor® top quality rubber-covered nylon-wound basketballs with butyl bladders. All prism packs include one of each color - Blue Green Orange Purple Red and Yellow. Official size.With Top Quality MacGregor rubber balls.We have the ultimate color management system with SIX colors! Use our system and provide each group with its own unique ball color! No more arguments about whose ball is left on the field or whose turn it is to play. If it’s your color it’s your ball.