High Quality Material: The volleyball spike training system is made of Neoprene which is flexible and durable. Solo Design: The volleyball hitting trainer works on arm swing, ball contact, and footwork without the need of another person. D Ring Carabiner Clip Design: D Ring Carabiner clips are suitable for hanging anywhere which is easy to clip and replace. perfect Gift: The volleyball spike trainer is great gift for high school girls, boys and begginer. It is perfect for you to exercise jumping ability. Total length: 85cm, rubber tube length: 35cm Colour: black Material: neoprene + metal Package Contents: 1 x Volleyball Trainer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.