Tennis Balls, offered by us, are made of high quality wool and rubber for superior performance. These Tennis Balls feature special technology for more longevity in the core and better durability. The color of Tennis Balls keeps the visibility at a maximum. These Tennis Balls are made of extra-duty felt, conducive for hard court play. Availability : Available in cans of 3 balls per can and 24 cans per case. Note : Cases of balls do not qualify for free shipping