Wilson US Open Extra Duty Tennis Balls - (1 Dozen Cans) Valterra It features an LCD screen

It features an LCD screen that tracks your speed

which boasts Nike Dry fabric with moisture-wicking Dri-FIT technology and a classic on-court look

Space saver design: fold it up and walk away-in one easy step

while being eco-friendly

The Carbonic TLT lenses are polarized to cut glare

Wilson US Open Extra Duty Tennis Balls - (1 Dozen Cans) Valterra It features an LCD screenBrand: Wilson Features: 12 Cans Publisher: Wilson Details: Extra Duty The Official Ball of the US OPEN since 1978 Optimal performance and durability on hard courts Set of 1 dozen cans for a total of 36 tennis balls Package Dimensions: 18. 0 x 14. 4 x 6. 7 inches