Good consistency and roundness make for a great quality ball. 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 standard white foosball is used in more residential and amateur settings. This pack includes 4 - 36mm diameter white balls.