Product details:

The premium quality tennis balls use Penn`s exclusive LongPlay felt for extended durability and they utilize the Smart Optik high visibility felt treatment for a 19% improvement in visibility over the standard tennis ball. Penn Tour tennis balls are engineered with optimum core and felt technologies for an unrivaled blend of consistency, playability, and longevity. The balls are approved for USTA and ITF play.Note: 1 case is 18 cans of 4 balls per can