The Dunlop(R) Pro Squash Balls are the official ball of the WSF, PSA, and WISPA. These two dot squash balls are used in professional international competition and constructed from a high-quality, durable rubber compound to give you the durability needed to go up against the strongest competition. Trusted by the world's top players-you will own the court with these pro-level squash balls from Dunlop(R). FEATURES: Two dot squash balls Ultimate performance ball for professional, tournament, and club players Official ball of the WSF, PSA, WISPA Used in professional international competition N-1SR Molecular Technology and high-quality, durable rubber compound construction Dunlop