Gosen Poly Professional 16 (1.29mm) - Black (Set) Junior tennis balls this extra duty ball is

this extra duty ball is ideal to use on hard

Shaft Material: 40T High Modulus Graphite

Grip Type : Prokennex Synthetic

it does not suffer any deformation

while the Kinetic technology in the racket's handle provides a counter balance during gameplay that helps to dampen vibration

Gosen Poly Professional 16 (1.29mm) - Black (Set) Junior tennis balls this extra duty ball isFirm and very controlled response for power baseliners. Specifications Item POLY PROFESSIONAL 16 [LIMITED QUANTITY] Item Code TS130 Material Special blended polyester mono filament Gauge 1. 29mm (16GA.) Length 12. 2m (40FT.) Color Black Origin MADE IN JAPAN