Tennis Ball Tb930 Speed 4 Pack

Felt: This ball is made of 75% natural felt, which makes it very durable..Core: This ball has a core made from natural rubber. This provides a quality bounce and excellent durability..This core was developed in collaboration with our partner factory..Packaging: 4-ball pack..Weight: 58.4 g.ITF standard between 56 g and 59.4 g..Diameter: 6.54 centimetres.ITF standard between 6.54 centimetres and 6.86 centimetres..Bounce height: 142 cm (ball dropped from a height of 2.54 m).ITF standard between 135 cm and 147 cm..Ball deformation: High viscosity index for a more comfortable ball..The viscosity index is calculated using the ball's deformation measurements.