Description: - Replacement ball for Tennis Trainer. - Tie the ball to the base by rubber band, no need to pick up the balls frequently. - Use for practicing all your tennis skill. - Great for indoor and outdoor practice. - Ball was made of high quality rubber and felt, lightweight and durable, easy to carry. - 2mm thickness cord, more strong and durable.Specification: - Material: Rubber + Felt - Color: Green - Ball Diameter: approx. 64mm / 2.5inch - Cord Length: approx. 3.5m / 11.5ft - ( meters fall, the ball 130cm)Package Includes:1 Piece TennisNote:Color maybe slightly different due to different monitor.The above size is measured by hand, please allow slightly difference. Thanks !