SUNSKY 2 PCS High Elastic Wear-Resistant Tennis Trainer 2 PCS ennis Trainer(With Rope & Ball)

Material: chemical fiber/rubber, etc.

Fasten the bungee cord through the thread hole and tie a firm knot

Pull out the plug, fill it with water or sand to increase the weight, easy to use

There is a tennis groove on the front, and tennis can be placed after training

The diameter of the tennis ball is 6.35-6.67 cm, the elastic coefficient is 2.54 meters, and the rebound height is about 1.3 meters when dropped from a hard ground