Foosballs are the most commonly replaced part of a foosball table as the outer surface of the ball tends to wear smooth reducing ball control and many times they just become lost or missing. It is a great idea to always have several spares on hand. Foosball balls come in many different styles with different playing qualities. Cork foosballs are great balls for learning foosball - especially if you find yourself playing on entry level tables that came with super slick un-pinnable balls! Cork balls are associated with the European style tables. They are known for being sticky and tacky - that helps to improve ball control for the finesse games that are played on European tables. Each ball is 35mm and comes in a pack of 4.