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. The engraved foosball is a harder ball for a longer lasting shape and better rebounding. The engraving allows for increased grip and ball control. Each ball is 36mm in diameter.