Penn Regular Duty Tennis Balls (Case 24X) Size:OS Keeps everything in its place

Keeps everything in its place and keeps courts looking neat and inviting

Smart Buttcap: A versatile system that allows players to customize strap size or completely remove the wrist strap

its micro-composite fibers provide high resiliency for increased power

Pentagonal shape digs into ball for greater spin potential

Featuring a tri-polymer construction with a low-friction additive

Penn Regular Duty Tennis Balls (Case 24X) Size:OS Keeps everything in its placePenn Championship is Americas #1 Selling Tennis Ball and represents the standard by which all other tennis balls are measured. It features a controlled fiber release for consistent nap, natural rubber for consistent feel and reduced shock, and interlocked wool fiber for longer wear. Penn Championship is the Official Ball of USTA Leagues. It is USTA and ITF approved and is available in extra duty felt or regular duty felt The Championship Line provides