Description This is a volleyball spike trainer, which is made of high-class and anti-wear materials, durable for long-lasting use. The volleyball trainer can help your kid improve his or her skills with the youth portable volleyball training strap. Keep your kids active and teach them skills at a young age with this indoor portable volleyball trainer. Features -Color:Black -Material:Nylon, Sticker -Size:71.00X33.00X13.00cm/27.90X12.97X5.11in - Adoption of premium and stable material, durable and safe to use, which has a long using time. - The volleyball spike trainer is in a simple design, but it is very useful and practical. - Our volleyball spike trainer is easy to adjust, you can adjust the cord according to your height. - With our volleyball spike training equipment you can easily improve your jumping, hitting speeds and force, arm swing technique, etc. - It is designed to bounce randomly, so volleyball players can their hand-eye coordination, improves reflexes, and generates quick reactions. Adoption of premium and stable material, durable and safe to use, which has a long using time. The volleyball spike trainer is in a simple design, but it is very useful and practical. Our volleyball spike trainer is easy to adjust, you can adjust the cord according to your height. With our volleyball spike training equipment you can easily improve your jumping, hitting speeds and force, arm swing technique, etc. It is designed to bounce randomly, so volleyball players can their hand-eye coordination, improves reflexes, and generates quick reactions.