The unrivalled performance, durability and consistency of Dunlop Squash balls are the reasons why Dunlop continues to be the World's No.1 squash ball. Dunlop is the official ball of the World Squash Federation (WSF) and the Professional Squash Association (PSA). **Ball Types and Characteristics:** * **Double Yellow Dot:** Advanced players, standard size, shortest hangtime, very low bounce. Engineered with N-1SR³ construction technology for unparalleled durability and playability. * **Single Yellow Dot:** Club/Team players, standard size, 10% longer hangtime, low bounce. Engineered with N-1SR³ construction technology for unparalleled durability and playability. * **Red Dot:** Intermediate players, 6% larger size, 20% longer hangtime, medium bounce. Engineered with N-1SR³ construction technology for unparalleled durability and playability. * **Blue Dot:** Beginner players, 12% larger size, 40% longer hangtime, high bounce. Engineered with N-1SR³ construction technology for unparalleled durability and playability. All Dunlop balls are engineered with N-1SR³ construction technology, an elastic hydrocarbon polymer with 12 compounds to create a unique construction material that delivers unparalleled durability and playability.