Amazon.com : WILSON Triniti Tennis Balls - Single Can (3 Balls),Black : Sports & Outdoors
Wilson Double Core on Twitter: "Introducing the Wilson double core tennis ball it will keep that new ball bounce point after point, game after game! http://t.co/PgccIUxhpI" / Twitter
Amazon.com : WILSON Tennis Balls, Triniti, Set of 4 Balls, 100% Recyclable Case, Wrt125200,Blue : Sports & Outdoors