Item Name: Trainer String Professional Elastic Rope Rebound Practice Tennis Training Ball. Weight: 56.7-58.5gDiameter: 63.5-66.7mmAdvancing deformation: 0.23-0.27N Material: High quality rubber and woolenElasticity: 138--147cmDescription:It takes up small space, and can be used on outdoor or indoor, easy to carry.It can have the same effect with the original one.It is used for tennis training.Package Included:5 x Tennis Ball with String (without other accessory)Note:Please allow 1-3mm differs due to manual measurement.Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. *
