Play like a pro with the Dunlop Pro squash ball. The official squash ball of the WSF and PSA and the only ball used in international professional squash competitions.  The Dunlop Double Yellow Dot Pro Squash Ball is the ultimate performance squash ball for professional, tournament and club players.  An elastic hydrocarbon polymer is infused with 12 compounds, resulting in a construction material with unmatched playability and durability characteristics that make this Dunlop Pro squash ball the #1 squash ball in the world!