High-quality Material: This volleyball serving trainer is combined with a nylon cord and a foam stick, without involving any metal or hard objects close to the place where your hand make contact with the ball, ensuring security to the utmost extent whiling training Easy to Use: This volleyball serving trainer comes with a durable Carabiner, you can easily hook it to basket hoops or fasten it to basket hoops directly to ensure more stability Training Partner: This ball return for basketball hoop can accompany you training as you want and can help improve your wicked-fast arm speed and spiking power without ever chasing a ball Good Reaction: This volleyball rebounder are able to bounce randomly if hit, so volleyball players can enhance their hand-eye coordination, improves reflexes, and generates quick reactions Adjustable Length Design: The height can be adjusted a little bit with the buckle on nylon strap ( up to 7.5cm / 2.95"). The longest length of the nylon strap is 43cm / 17", the ball holder pouch is 32cm / 12.6" Why choose our volleyball spike trainer? The road to an expert volleyball player has never been easier to do with this great volleyball spike trainer. Hook it over to ceilings and basketball goals, adjust the cord according to your preference, and start spiking. It improves quality of your skills. It is strong enough to hold any size of balls for playing. It is durable and solid, and with great quality that can last you a long time. Specifications Material: nylon + foam Size: total length: 33.5inch Adjustable length: 2.95inch Packages Included 1 volleyball training cord 1 Carabineer clip